AOL_AD_WWW2007-Open_FIXED.pdf 4/13/2007 3:13:25 PM

C

M

Y

CM

MY

CY

CMY

K www2007.org

Message from the Chair of IW3C2

On behalf of the International Conference Steering Committee (IW3C2), I welcome you to the 16th conference of our series. As you already know, the World Wide Web was first conceived in 1989 by Tim Berners-Lee at CERN in Geneva, Switzerland. The first conference, WWW1, was held at CERN in 1994. The conference series aims to provide the world a premier forum about the evolution of the Web, the standardization of its associated technologies, and the Web’s impact on society and culture. These conferences bring together researchers, developers, users, and vendors – indeed all of you who are passionate about the Web and what it has to offer, now and in the future.

The IW3C2 was founded by Joseph Hardin and Robert Cailliau in August 1994 and has been responsible for the International WWW Conference series ever since. Except for 1994 and 1995 when two conferences were held each year, WWWn became an annual event held in late April or early May. The location of the conferences rotates among North America, Europe, and Asia. In 2002 we changed the conference designator from a number (1 through 10) to the year it is held; i.e., WWW11 became known as WWW2002, and so on. You may browse our website http://www. iw3c2.org/ for information on past and future conferences.

I wish to recognize our long-term partner, the World Wide Web Consortium (W3C), who has contributed a significant part of the conferences’ contents since the very beginning. We also appreciate the cooperation of ACM and IFIP. Together they help make our conferences the best in the Web area.

To the participants of previous conferences: it is nice to see you again! To the new delegates: it is nice to see you here! To everyone: we hope to see you in Beijing at WWW2008!

Vincent Shen, Hong Kong University of Science and Technology

Message from the General Chairs

On behalf of the International World Wide Web Conference Steering Committee (IW3C2) and the University of Calgary, we are delighted to welcome you to the 16th International World Wide Web Conference (WWW2007) in Banff. The WWW conference is the premier international forum for sharing the latest information about the Web, its technologies, and its future evolution.

We have an excellent conference lined up for you. WWW2007 received a record number of refereed paper submissions this year, and accepted just under 15% of them. Complementing the high quality papers are 8 exciting workshops, 12 informative tutorials, 7 expert panels, about 100 posters with late-breaking results, plus the always-popular DevTrack and W3C track offerings. Bonus events include a WOW tutorial and a look at the history of the Web. A busy week indeed!

It is difficult to estimate the time and effort required to organize a conference of this magnitude, but the task is tractable with the right organizing committee at your command. Many people have helped make this conference a success. Particularly demanding is the task of the Program Chairs: we thank Peter Patel-Schneider and Prashant Shenoy for their many hours of work on the conference. The high quality of the technical program owes much to their efforts, as well as the efforts of the track chairs, deputy chairs, program committee, and external reviewers.

The Local Organizing Committee did everything we asked of them, and more. EventPlan served as the conference PCO, dealing with many logistical issues, including hotel contracts, overflow hotels, travel information, and budget. Key20 Media (formerly QuestMedia) did a wonderful job with the WWW2007 sponsorship program. Denilson Barbosa did an excellent job publicizing the conference, with print ads in CACM and regular monthly newsletters. We thank Camille Sinanan for her super-human efforts as Registration Chair and financial officer. Lisa Higham managed our student travel award program. Sue Williamson designed conference promotional material, with photos courtesy of the Banff/Lake Louise Tourism Bureau. The IW3C2 and WWW2006 gave valuable advice and support at crucial moments. The Banff Springs Hotel personnel, especially Barb Wallace, assisted greatly with our conference planning. Gwen, Nathan, Qian, and Chris handled the Web site, program guide, and CD, and the WWW2007 volunteer team coordinated by John Miller helped make everything run smoothly this week.

We wish to thank our four plenary speakers (Tim Berners-Lee, Prabhakar Raghavan, Bill Buxton, and Dick Hardt) for sharing their insights, as well as the other authors and presenters for their contributions. We also thank our sponsors (especially AOL!) for their generous financial contributions to the conference.

Thank you all for attending WWW2007. Enjoy the conference, the hotel, the food, the beautiful mountain scenery, and the wonderful spring weather! Our blog awaits your comments.

Carey Williamson, University of Calgary Mary Ellen Zurko, IBM

i Message from the Program Chairs

On behalf of the WWW2007 Program Committee, we are delighted to welcome you to WWW2007, the 16th conference in the World Wide Web conference series.

The number of submissions to the refereed papers track and their quality has grown over the years. This year we had a record 755 submissions, of which we accepted 111 papers (a 14.7% acceptance rate). In response to the growing interest from the research community, we added a fourth day to the refereed papers track program, which allowed us to accept approximately 20% more papers than previous years. Despite this increase, many good papers had to be turned away.

The refereed papers track consists of thirteen research areas. This year, we introduced two new tracks – Web Services and XML and Web Data, which were formed by splitting the old “XML and Web Services” track into two new tracks. We also eliminated the “Alternate papers tracks” by folding those research areas into the regular refereed paper tracks. Thus, Technology for Developing Regions and Industrial Practice and Experience were regular refereed paper tracks this year and submissions were subjected to the same process as other tracks. We are pleased to report that both sets of changes were successful–the new tracks drew a healthy number of submissions and the quality of submissions to the new and the former alternate tracks were comparable to the other tracks. The table below summarizes the number of submissions and the number of accepted papers in each track.

Track Submissions Accepts Browsers and User Interfaces 48 6 105 14 E* Applications 52 6 Industrial Practice and Experience 22 4 Performance and Scalability 30 7 Pervasive Web and Mobility 11 3 Search 140 20 Security, Privacy, Reliability and Ethics 63 10 Semantic Web 114 16 Technology for Developing Regions 20 4 Web Engineering 40 7 Web Services 56 8 XML and Web Data 52 6

All papers underwent a rigorous review process by the technical program committee: each paper was reviewed by at least three reviewers, followed by an online discussion phase to reconcile conflicting opinions. Candidate accept, borderline and controversial papers were discussed at length at a two day program committee meeting, which was attended by all track and deputy chairs. Some track chairs attended the meeting via audio conferencing from a satellite California site. We are pleased with the final outcome and present to you a technical program comprising 111 papers, all of which are of the highest standard.

The task of putting together the technical program of a large conference such as WWW2007 is a substantial endeavor. Many people contributed to the success of the technical program. We would like to thank the entire WWW2007 program committee for their hard work and dedication. The general chairs Mary Ellen Zurko and Carey Williamson have been extremely supportive in a multitude of ways. Special thanks to Andrei Voronkov for his help with the Easychair web reviewing. Thanks to Alcatel-Lucent Bell Labs for hosting the Program Committee meeting, to Google California for hosting the satellite site for the PC meeting, and to Lisa Tolles of Sheridan Printing for assembling the conference proceedings.

Last but not least, we would like to thank the numerous authors for submitting excellent papers and to the attendees for making the conference a success.

Peter F. Patel-Schneider Prashant Shenoy Bell Labs Research, USA University of Massachusetts Amherst, USA

ii

Table of Contents

Message from the Chair of IW3C2...... i

Message from the General Chairs...... i

Message from the Program Chairs...... ii

WWW2007 Organization and Committees...... 2

Plenary Talks...... 8

Tutorials...... 10

Workshops...... 14

On-Site Logistics...... 18

Schedule at a Glance – Tuesday...... 20

Maps...... 22

Schedule at a Glance – Wednesday...... 24

Schedule at a Glance – Thursday...... 25

Schedule at a Glance – Friday...... 26

Schedule at a Glance – Saturday...... 27

Refereed Papers...... 28

W3C Track...... 34

DevTrack...... 35

Industry Talks and Panels...... 36

Web History...... 37

Panels...... 38

Posters...... 40

Sponsor Contact Information...... 44

Social Events...... 46

Author Index...... 47

1 www2007.org

Organization and Committees

Conference Committee WWW2007 Technical Volunteers Chair: John Miller, Southern Cross University, Australia General Chairs Carey Williamson, University of Calgary, Canada Paul Bohunsky, Vienna University of Technology, Austria Mary Ellen Zurko, IBM, USA Ilknur Celik, University of Nottingham, UK Susan Chebotariov, UCLA, USA Program Chairs Wanda De Verrelle-Hill, Southern Cross University, Australia Peter Patel-Schneider, Bell Labs Research, USA Sebastien Forget, Canada Post, Canada Prashant Shenoy, University of Massachusetts at Amherst, USA Daniel Gill, University of Calgary, Canada Cynthia Henry, Texas Tech University, USA Professional Conference Organizer Joyce Hodgson, University of Calgary Unni Soelberg-Claridge, EventPlan, Calgary, Canada Edward Chong Huang, Chinese Academy of Sciences, China Aileen (Boyle) Lozie, EventPlan, Calgary, Canada Michael Huggett, UBC, Canada Sheridan Jeary, Bournemouth University, UK Local Organizing Committee Maria Kaceriakova, University of St. Andrews, Scotland Martin Arlitt, HP Labs/University of Calgary, Canada Isaac Kankum, University Duisberg-Essen, Germany Naimul Basher, University of Calgary, Canada Dragana Likavec, Fraunhofer Institute, Germany Denilson Barbosa, University of Calgary, Canada Rui Lopes, University of Lisbon, Portugal Jean Cao, University of Calgary, Canada Maram Meccawy, University of Nottingham, UK Carole Carlton, iCORE, Calgary, Canada Matthew Montebello, University of Malta, Malta Marian Doerk, University of Magdeburg, Germany Bang Nguyen, National University of Singapore, Singapore Jeffrey Erman, University of Calgary, Canada Phil Petrides, Electrosonic Inc., UK Mingwei Gong, University of Calgary, Canada Cyril Schoreels, University of Nottingham, UK Chris Gutteridge, University of Southampton, UK Mark Schueler, Cisco, USA Emir Halepovic, University of Calgary, Canada Giovanni Tummarello, Universita Polytechnica delle Marche,Italy Lisa Higham, University of Calgary, Canada Topher White, Simum Innovations, San Francisco, USA Gwen Houtzager, University of Calgary, Canada Michal Jacovi, IBM Haifa Research Lab, Israel Rohit Khare, USA Program Committee Namrata Khemka, University of Calgary, Canada Zongpeng Li, University of Calgary, Canada Program Chairs Aniket Mahanti, University of Calgary, Canada Peter Patel-Schneider, Bell Labs Research, USA Anirban Mahanti, University of Calgary, Canada Prashant Shenoy, University of Massachusetts at Amherst, USA Megabite, Bow River, Banff, Canada John Miller, Southern Cross University, Australia Browsers and User Interfaces Nadim Parvez, University of Calgary, Canada Chair: Rob Miller, Massachusetts Institute of Technology, USA Phillipa Sessini, University of Calgary, Canada Deputy: Xing Xie, Research Asia, China Camille Sinanan, University of Calgary, Canada Hongxia Sun, University of Calgary, Canada Chieko Asakawa, IBM, Japan Sue Williamson, Calgary, Canada Shumeet Baluja, Google, USA Nathan Wormsbecker, University of Calgary, Canada Patrick Baudisch, , USA Qian Wu, University of Calgary, Canada Peter Brusilovsky, University of Pittsburgh, USA Yujing Wu, University of Calgary, Canada Ed Chi, PARC, USA Susan Dumais, Microsoft Research, USA IW3C2 Steering Committee Vicki Hanson, IBM Research, USA Robin Chen, AT&T Labs Research, USA Simon Harper, University of Manchester, UK David Duce, Oxford Brookes University, UK Masahiro Hori, Kansai University, Japan Allan Ellis, Southern Cross University, Australia Chris Johnson, Glasgow University, UK Wendy Hall, University of Southampton, UK Matt Jones, Swansea University, UK Ivan Herman, CWI/W3C, The Netherlands Yutaka Kidawara, NICT, Japan Arun Iyengar, IBM, USA Tessa Lau, IBM Almaden, USA Gusztav Hencsey, Sztaki, Hungary Paul P. Maglio, IBM Almaden, USA Daniel Schwabe, PUC Rio de Janeiro, Brazil Helen Petrie, University of York, UK Vincent Shen, HKUST, Hong Kong, China Bebo White, SLAC (retired), USA Mary Ellen Zurko, IBM, USA Les Carr, University of Southampton, UK (ex officio) Jinpeng Huai, , China (ex officio) Gonzalo Leon, ESTI, Spain (ex officio) Carey Williamson, University of Calgary, Canada (ex officio)

2 Organization and Committees

Data Mining Erica Melis, DFKI, Germany Chair: Roberto Bayardo, Google, USA Daniel Schwabe, PUC Rio de Janeiro, Brazil Deputy: Kyuseok Shim, Seoul National University, Korea Amit Sheth, Wright State University and Semagix, USA Heinz Stockinger, University of Vienna, Austria Charu Aggarwal, IBM T.J. Watson Research Center, USA Kien-Lee Tan, National University of Singapore, Singapore Rakesh Agrawal, Microsoft Search Labs, USA Klaus Tochtermann, TU Graz, Austria Wray Buntine, Helsinki Institute of Information Technology, Xiaoxin Wu, Intel, China Finland Aoying Zhou, Fudan University, China Ming-Syan Chen, National Taiwan University, Taiwan Industrial Practice and Experience Wei Fan, IBM T.J. Watson Research Center, USA Chair: Mehran Sahami, Google, USA Aristides Gionis, University of Helsinki, Finland Deputy: Kobus van der Merwe, AT&T Labs - Research, USA Marko Grobelnik, J. Stefan Institute, Slovenia Jiawei Han, University of Illinois at Urbana-Champaign, USA Nikos Anerousis, IBM Research, USA Andreas Hotho, University of Kassel, Germany Eric Brill, Microsoft Research, USA Masaru Kitsuregawa, University of Tokyo, Japan Mayur Datar, Google, USA Dongwon Lee, Penn State University, USA Ashutosh Garg, Google, USA Bing Liu, University of Illinois at Chicago, USA Rayid Ghani, Accenture Labs, USA Mark Manasse, Microsoft Research, USA Eric Horvitz, Microsoft Research, USA Dunja Mladenic, J. Stefan Institute, Slovenia Ravi Kumar, Yahoo! Research, USA Beng Chin Ooi, National University of Singapore, Singapore Yunhao Liu, Hong Kong University of Science and Technology, China Jung Soo Park, Sungshin University, Korea Omid Madani, Yahoo! Research, USA Jian Pei, Simon Fraser University, Canada Z. Morley Mao, University of Michigan, USA Sridhar Rajagopalan, IBM Almaden, USA Vibhu Mittal, Google, USA Raghu Ramakrishnan, University of Wisconsin/Yahoo!, USA Andrew W. Moore, Queen Mary, University of London, UK Rajeev Rastogi, Bell Laboratories, USA Richard Mortier, Microsoft Research, Cambridge, UK Deepak Ravichandran, Google, USA Jan Pedersen, Yahoo!, USA Barry Smyth, University College Dublin, Ireland Dan Pei, AT&T Labs - Research, USA Myra Spiliopoulou, Universitat Magdeburg, Germany Yin Zhang, University of Texas at Austin, USA Ramakrishnan Srikant, Google, USA Andrew Tomkins, Yahoo!, USA Performance and Scalability Ji-Rong Wen, , China Chair: Michele Colajanni, University of Modena, Italy Jeffrey Xu Yu, The Chinese University of Hong Kong, Hong Kong Deputy: Martin Arlitt, HP Labs, USA and University of Calgary, Canada E* Applications Chair: Wolfgang Nejdl, L3S and University of Hannover, Virgilio Almeida, Federal University of Minas Gerais, Brazil Germany Azer Bestavros, Boston University, USA Deputy: Elisa Bertino, Purdue University, USA Ernst Biersack, Institut Eurecom, France Valeria Cardellini, University of Rome “Tor Vergata”, Italy Juergen Angele, Ontoprise, Germany Abhishek Chandra, University of Minnesota, USA Wolf-Tilo Balke, L3S and University of Hannover, Germany Ming-Syan Chen, National Taiwan University, Taiwan Jim Basney, NCSA, USA Mike Dahlin, University of Texas at Austin, USA Kalina Bontcheva, University of Sheffield, UK Jeff Dean, Google, USA Athman Bouguettaya, Virginia Tech, USA Anja Feldmann, Deutsche Telekom Laboratory and Technical Peter Brusilovsky, University of Pittsburgh, USA University Berlin, Germany Malu Castellanos, HP Research Labs, USA Steve Gribble, University of Washington, USA Stefano Ceri, Politecnico di Milano, Italy Arun Iyengar, IBM Research, USA Boris Chidlovskii, Xerox Research Centre Europe, France Sue Moon, KAIST, Korea Alexandra Cristea, University of Warwick, UK Vivek Pai, Princeton University, USA John Domingue, Knowledge Media Institute, UK Michael Rabinovich, Case Western Reserve University, USA Thomas Fahringer, University of Innsbruck, Austria Bianca Schroeder, Carnegie Mellon University, USA Jianping Fan, University of North-Carolina at Charlotte, USA Xueyan Tang, Nanyang Technological University, Singapore Christoph Freytag, Humboldt University, Berlin, Germany Maarten Van Steen, Vrie University, The Netherlands Moustafa Ghanem, Imperial College, London, UK Arun Venkataramani, University of Massachusetts at Amherst, USA C. Lee Giles, Pennsylvania State University, USA Craig Wills, Worcester Polytechnic Institute, USA Jeffrey Grethe, University of California, San Diego, USA Friedrich Hesse, University of Tubingen, Germany Geert-Jan Houben, VU Brussel, Belgium Matthias Jarke, RWTH Aachen, Germany Rohit Khare, CommerceNet, USA Rob Koper, Open University, Netherlands Massimo Mecella, University of Rome La Sapienza, Italy

3 www2007.org

Pervasive Web and Mobility Altigran Soares da Silva, University of Amazonas, Brazil Chair: Jason Nieh, Columbia University and VMware, USA Torsten Suel, Polytechnic University, USA Deputy: Robin Kravets, University of Illinois at Urbana-Champaign, Panayiotis Tsaparas, Microsoft, USA USA Sebastiano Vigna, University of Milano, Italy Gerhard Weikum, Max-Planck-Institut fur Informatik, Germany Nina Bhatti, HP Labs, USA Hugo Zaragoza, Yahoo! Research, Barcelona, Spain Nigel Davies, Lancaster University, UK Justin Zobel, RMIT, Australia Maria Ebling, IBM Research, USA Gail Kaiser, Columbia University, USA Security, Privacy, Reliability, and Ethics Reiner Ludwig, Ericsson Research, Germany Chair: Angelos Keromytis, Columbia University, USA Amy Murphy, ITC-IRST, Italy Deputy: Dan Wallach, Rice University, USA Chandra Narayanaswami, IBM Research, USA Bhaskaran Raman, IIT Kanpur, India Scott Alexander, Telcordia, USA Pablo Rodriguez, Microsoft Research, UK Weidong Cui, Microsoft Research, USA Bill Schilit, Intel Research, USA George Danezis, KU Leuven, Belgium Roberto Di Pietro, University of Roma “La Sapienza”, Italy Search Nick Feamster, Georgia Tech, USA Chair: Andrei Broder, Yahoo! Research, USA Bao Feng, Institute for Infocomm Research, Singapore Deputy: Ronny Lempel, IBM Haifa, Israel Kevin Fu, University of Massachusetts at Amherst, USA John L. Griffin, BAE Serge Abiteboul, INRIA, France Stuart Haber, HP Labs, USA Lada Adamic, University of Michigan, USA Goichiro Hanaoka, JAIST, Japan Judit Bar-Ilan, Bar Ilan University, Israel Markus Jakobsson, University of Indiana, USA Ziv Bar-Yossef, Technion, Israel Sam King, University of Illinois at Urbana-Champaign, USA Andras A. Benczur, Hungarian Academy of Sciences, Hungary Yoshi Kohno, University of Washington, USA Paolo Boldi, University of Milano, Italy Shriram Krishnamurthy, Brown University, USA Eric Brown, IBM T.J. Watson Research Center, USA Christopher Kruegel, Technical University Vienna, Austria Soumen Chakrabarti, IIT Bombay, India Ninghui Li, Purdue University, USA Junghoo Cho, UCLA, USA Patrick McDaniel, Penn State University, USA Abdur Chowdhury, AOL Research, USA Raphael C.-W. Phan, Swinburne University of Technology, Malaysia Nick Craswell, Microsoft Research, Cambridge, UK Vassilis Prevelakis, Drexel University, USA Brian Davison, Lehigh University, USA Eric Rescorla, RTFM Inc., USA Nadav Eiron, Google, USA Jim Roskind, Roskind Consulting, USA Marcus Fontoura, Yahoo!, USA Ke Wang, Google, USA Juliana Freire, University of Utah, USA Brent Waters, SRI, USA C. Lee Giles, Penn State University, USA Nick Weaver, ICSI, USA Eric Glover, Ask, USA Susanne Wetzel, Stevens Institute of Technology, USA Antonio Gulli, Ask, USA Matt Wright, University of Texas at Arlington, USA David Hawking, CSIRO, Australia Monika Henzinger, Google, USA Semantic Web Jeanette Janssen, Dalhousie University, Canada Chair: Rudi Studer, University of Karlsruhe and FZI, Germany Glen Jeh, Google, USA Deputy: Riichiro Mizoguchi, Osaka University, Japan Vanja Josifovski, Yahoo!, USA Kevin Lang, Yahoo!, USA Dean Allemang, Top Quadrant, USA Hang Li, Microsoft Research Asia, China Sean Bechhofer, University of Manchester, UK Ling Liu, Georgia Tech, USA Harold Boley, University of New Brunswick, Canada Wei-Ying Ma, Microsoft Research Asia, China Francois Bry, University of Munich, Germany Yoelle Maarek, Google, Israel Paul Buitelaar, DFKI, Germany Kevin McCurley, Google, USA Key-Sun Choi, KAIST, Korea Frank McSherry, Microsoft, USA Nigel Collier, National Institute of Informatics, Japan Massimo Melucci, University of Padova, Italy Hamish Cunningham, University of Sheffield, UK Alistair Moffat, University of Melbourne, Australia John Davies, British Telecom, UK Gonzalo Navarro, University of Chile, Chile Grit Denker, SRI International, USA Christopher Olston, Yahoo!, USA Li Ding, Stanford University, USA Iadh Ounis, University of Glasgow, UK Thomas Eiter, Vienna University of Technology, Austria Davood Rafiei, University of Alberta, Canada Dieter Fensel, DERI, University of Innsbruck, Austria Sriram Raghavan, IBM, USA Tim Finin, University of Maryland, Baltimore County, USA Sridhar Rajagopalan, IBM, USA Jennifer Golbeck, University of Maryland, USA Edleno Silva de Moura, Universidade Federal do Amazonas, Brazil Christine Golbreich, Universite de Rennes 1, France Fabrizio Silvestri, ISTI-CNR, Pisa, Italy Asuncion Gomez-Perez, UPM, Spain D. Sivakumar, Google, USA Sung-Kook Han, Won Kwang University, Korea

4 Lynda Hardman, CWI, The Netherlands Geert-Jan Houben, Eindhoven University of Technology, Manfred Hauswirth, DERI Galway, Ireland The Netherlands Jeff Hein, Lehigh University, USA Stanislaw Jarzabek, National University of Singapore, Singapore Kaoru Hiramatsu, NTT Communication Science Laboratories, Gerti Kappel, Vienna University of Technology, Austria Tokyo, Japan Nora Koch, Ludwig-Maximilians-Universitat Munchen, Germany Pascal Hitzler, University of Karlsruhe, Germany David Lowe, University of Technology, Australia Masahiro Hori, Kansai University, Japan Wei-Ying Ma, Microsoft Research Asia, China Eduard Hovy, UCS/ISI, USA Heinrich Mayr, University of Klagenfurt, Austria Vipul Kashyap, Partners HealthCare System, Inc., USA Emilia Mendes, University of Auckland, New Zealand Atanas Kiryakov, Ontotext Lab, Sirma Group, Bulgaria Luis Olsina, Universidad Nacional de La Pampa, Argentina Michel Klein, Vrije Universiteit Amsterdam, The Netherlands Vicente Pelechano, Universidad Politecnica de Valencia, Spain Alain Leger, France Telecom, France Werner Retschitzegger, University of Linz, Austria Luke McDowell, US Naval Academy, USA Gustavo Rossi, Universidad Nacional de la Plata, Argentina Gregoris Mentzas, NTUA, Greece Arthur Ryman, IBM Toronto Lab, Canada Dunja Mladenic, J. Stefan Institute, Slovenia Klaus-Dieter Schewe, Massey University, New Zealand Enrico Motta, Open University, UK Daniel Schwabe, PUC Rio de Janeiro, Brazil Mark Musen, Stanford University, USA Wieland Schwinger, Johannes Kepler University Linz, Austria John Mylopoulos, University of Toronto, Canada Woojong Suh, Inha University, Korea Claire Nedellec, MIG-INRA, France Katsumi Tanaka, Kyoto University, Japan Massimo Paolucci, NTT, Germany Fabio Vitali, University of Bologna, Italy Dimitris Plexousakis, University of Crete, Greece Bebo White, Stanford Linear Center, USA Amit Sheth, Wright State University and Semagix, USA Umberto Straccia, ISTI-CNR, Italy Web Services Gerd Stumme, University of Kassel, Germany Chair: Paul Watson, University of Newcastle upon Tyne, UK Hideaki Takeda, National Institute of Informatics, Japan Deputy: Jim Webber, ThoughtWorks, Australia Takahira Yamaguchi, Keio University, Japan Boualem Benatallah, University of New South Wales, Australia Technology for Developing Regions Sanjay Chaudhary, DA-IICT, India Chair: Krithi Ramamritham, IIT Bombay, India Thomas Erl, SOA Systems, Canada Deputy: Kentaro Toyama, Microsoft Research, India Alan Fekete, University of Sydney, Australia Jinpeng Huai, Beihang University, China Richard Anderson, University of Washington, USA Hiro Kishimoto, Fujitsu, Japan Anupam Basu, Indian Institute of Technology, Kharagpur, India Frank Leymann, University of Stuttgart, Germany Michael Best, Georgia Tech, USA Mark Little, Jboss, UK Eric Brewer, University of California at Berkeley, USA Jimmy Nilson, JNSK, Sweden U.B. Desai, Indian Institute of Technology, Bombay, India Dare Obasanjo, Microsoft, USA S. Keshav, University of Waterloo, Canada Savas Parastatidis, Microsoft, USA Margaret Martonosi, Princeton University, USA Greg Pavlik, Oracle Corporation, USA Wagner Meira Jr., Universidade Federal de Minas Gerais, Brazil Denis Sosnoski, Sosnoski Software Solutions, New Zealand Tapan Parikh, University of Washington, USA Tony Storey, IBM, UK Jacques Steyn, Monash University, South Africa Japjit Tulsi, Google, USA Eswaran Subrahmanian, Carnegie Mellon University, USA William Vambenepe, Hewlett-Packard, USA Steve Vinoski, IONA Technologies, USA Web Engineering Stuart Wheater, Arjuna Technologies, UK Chair: San Murugesan, Southern Cross University, Australia Michal Zaremba, Digital Enterprise Research Institute, Ireland Deputy: Oscar Pastor Lopez, Polytechnic University of Valencia, Spain XML and Web Data Chair: Mark Baker, Coactus, Canada Virgilio Almedia, Federal University of Minas Gerais, Brazil Deputy: Juliana Freire, University of Utah, USA Luciano Baresi, Politecnico di Milano, Italy Rafael Calvo, University of Sydney, Australia Sihem Amer-Yahia, Yahoo! Research, USA Paul Dantzig, IBM T.J. Watson Research Center, USA Denilson Barbosa, University of Calgary, Canada Olga De Troyer, Vrije Universiteit Brussel, Belgium Michael Benedikt, Bell Labs, Lucent, USA Yogesh Deshpande, University of Western Sydney, Australia Angela Bonifati, Icar-CNR, Italy Oscar Diaz, University of the Basque Country, Spain John Boyer, IBM, USA Piero Fraternali, Politecnico di Milano, Italy Michael Champion, Microsoft, USA Martin Gaedke, University of Karlsruhe, Germany Chee Yong Chan, National University of Singapore, Singapore Aditya Ghose, University of Wollongong, Australia Micah Dubinko, Yahoo!, USA Athula Ginige, University of Western Sydney, Australia Wenfei Fan, University of Edinburgh, Scotland Angela Goh, Nanyang Technological University, Singapore Carlos Heuser, UFRGS, Brazil Jaime Gomez, Universidad de Alicante, Spain Ken Holman, Crane Softwrights, Canada

5 www2007.org

Christoph Koch, Saarbruken, Germany David Carmel, IBM, Israel Guido Moerkotte, University of Mannheim, Germany Fred Douglis, IBM, USA Fatma Ozcan, IBM Almaden, USA Piero Fraternali, University of Milan, Italy Tamer Ozsu, University of Waterloo, Canada Martin Gaedke, University of Karlsruhe, Germany Raghu Ramakrishnan, Yahoo! Research, USA Carole Goble, University of Manchester, UK Maya Ramanath, Max-Planck-Institut, Germany Ian Horrocks, University of Manchester, UK Rich Salz, IBM, USA Bing Liu, University of Illinois at Chicago, USA Sunita Sarawagi, IIT Bombay, India Wei-Ying Ma, Microsoft Research Asia, China Altigran Silva, UFAM, Brazil Lloyd Rutledge, CWI, The Netherlands Massimo Santini, University of Milan, Italy Posters Steffen Staab, University of Koblenz, Germany Chair: Xiaodong Zhang, Ohio State University, USA Dan Suciu, University of Washington, USA Deputy: Vova Soroka, IBM Haifa, Israel Terry Winograd, Stanford University, USA

Karine Barzilai-Nahon, University of Washington, USA Developers Track Brian Davison, Lehigh University, USA Chair: Danny Ayers Ido Guy, Technion, Israel Institute of Technology, Israel Deputy: Mark Nottingham, Yahoo! Inc, USA Michal Jacovi, IBM Haifa Research Lab, Israel Xuxian Jiang, George Mason University, USA Mark Baker, Coactus, Canada Quentin Jones, New Jersey Institute of Technology, USA Ian Bicking Chung-Ta King, National Tsinghua University, Taiwan Chris Bizer, Freie Universitat Berlin, Germany Santosh Kumar, University of Memphis, USA Dan Brickley Alex Liu, Michigan State University, USA Elliot Rusty Harold Dong Lu, Ask.com, USA Bill de Hora Natalia Marmasse, Google, USA Yves Lafon Gilad Ravid, University of Southern California, USA Thomas Roessler, W3C/ERCIM, France Eyal Sonsino, IBM Research, Israel James Tauber Hongwei Zhang, Wayne State University, USA W3C Track Tutorials and Workshops Chair: Marie-Claire Forgue, W3C, France Chair: Marc Najork, Microsoft, USA Deputy: Aya Soffer, IBM Haifa, Israel

Daniel Appelquist, Vodafone, UK Ricardo Baeza-Yates, Yahoo!, Spain

Platinum Sponsor

AOL is a global Web services company that operates some of the most popular Web destinations and offers a comprehensive suite of free software and services. The AOL Developer Network, available at dev.aol.com, provides developers with access to AOL’s robust technology platform. A majority-owned subsidiary of Time Warner Inc., AOL LLC is based in Dulles, Virginia. AOL and its subsidiaries also have operations in Europe, Canada and Asia. Learn more at AOL.com.

6 2006 SAP AG. SAP and the SAP logo are trademarks and registered trademarks of SAP AG in Germany and several other countries. The BlackBerry and RIM families of related marks, images and symbols are the exclusive properties of and trademarks or registered trademarks of Research In Motion Limited – used by permission. by used – Limited Motion In Research of registeredtrademarks or trademarks and of properties exclusive the are symbols and images marks, related of families RIM and BlackBerry The countries. other several and Germany in AG SAP of registeredtrademarks and trademarks are logo SAP the and SAP AG. SAP 2006    www2007.org

WWW2007 Plenary Talks

Tim Berners-Lee (Wednesday, May 9) The Two Magics of Web Science Abstract Web Science, of course, is largely engineering, as is . But Web Science is different. When you design a new Web technology, it involves both technical protocols and social conventions. These work together to produce the new system, a computer-mediated interaction between two people. The first magic (process we don’t understand) is when that interaction between two people scales to produce a new macroscopic phenomenon. The link between the microscopic and the macroscopic is fascinating. When we look at our macroscopic world and sigh, and wish it were better, it then takes a creative magic to see what new microscopic design could have the right effect. The creative leap of many neurons, and the collaboration of many people are the most exciting parts of the whole process, and what the Web has been about from day one.

Biographical Information: A graduate of Oxford University, England, Tim Berners-Lee holds the 3Com Founders chair and is a Senior Research Scientist at the Laboratory for Computer Science and (CSAIL) at the Massachusetts Institute of Technology (MIT). He is co-Director of the new Web Science Research Initiative (WSRI) and is a Chair in the Computer Science Department at the University of Southampton, UK. He is the Director of the World Wide Web Consortium (W3C), founded in 1994.

In 1989 he invented the World Wide Web, an -based hypermedia initiative for global information sharing while at CERN, the European Particle Physics Laboratory. He wrote the first web client and server in 1990. His specifications of URIs, HTTP and HTML were refined as Web technology spread.

Over the years, Tim has received many international awards, including The MacArthur Foundation “Genius” Grant, Japan Prize, the Prince of Asturias Foundation Prize, the Millennium Technology Prize, and Germany’s Die Quadriga Award. In 2001 he became a fellow of the Royal Society. Widely recognized as one of the greatest visionaries of our time, Tim Berners-Lee was given the rank of Knight Commander (the second-highest rank in the Order of the British Empire) by Queen Elizabeth II on July 16, 2004. He is the recipient of the 2007 Charles Stark Draper Prize, given by the National Academy of Engineering (US).

Prabhakar Raghavan (Thursday, May 10) Web N.0: What sciences will it take? Abstract The web has made a widely-hailed transition from its original incarnation to a putative state of “Web 2.0”. This transition has stemmed from the clever use of AJAX and efficient to enhance a user’s perception of responsiveness and interaction. In the process, the web experience has changed from a human interacting with a browser, to the emergence of a plethora of social media experiences. One consequence is that moving beyond the current notion of Web 2.0 demands research advances that straddle the boundaries between computational and social sciences, the latter including microeconomics, cognitive psychology and sociology. It also raises difficult questions on the use of data - ranging from the algorithmic to the societal.

This lecture will attempt to chart this interdisciplinary research agenda, arguing that the most influential research will require heavy interaction between these “hard” and “soft” sciences.

Biographical Information: Prabhakar Raghavan has been Head of Yahoo! Research since 2005. His research interests include text and web mining, and algorithm design. He is a Consulting Professor of Computer Science at Stanford University and Editor- in-Chief of the Journal of the ACM. Raghavan received his PhD from Berkeley and is a Fellow of the ACM and of the IEEE. Prior to joining Yahoo, he was Chief Technology Officer at Verity; before that he held a number of technical and managerial positions at IBM Research.

8 Bill Buxton (Friday, May 11) Design for the World Narrow Web Abstract It is easy to get lost in the enthusiasms of the moment. In the process, we tend to forget yesterday, much less 5 years ago. The thing to remember, however, is that tomorrow will be as different from today as today’s blogs, your/ my/his/her-face, RSS etc. are from the old days of alt.net.foobar. No new news here. So what does happen when browsers almost disappear, and search as a distinct application is nothing more than a quaint memory?

If the notion of ubiquitous computing was right, we won’t be thinking of web applications and services as software applications. The diversity of “web browsers” tomorrow will match the diversity of “ink browsers” (a.k.a. paper) today - in terms of diversity of form, function, location, and importance. It will be hard to decouple the “application” from the device, and the device from the location. And this, in turn, will accelerate the move towards the strong- specific from the weak-general approach to things that prevails today. And in all of this, the perceptible “web” that dominates the experience will more likely be the network that makes up the “society of devices” within the immediate physical context within which the interaction takes place.

In this context, the challenges of “social computing” will have as much (or more) to do with understanding, defining and exploiting the social mores of such “societies of devices” as it does with the social relationships of the people interacting over the network. These changes are going to force us to rethink our current assumptions about usage, as well as the economic and technological underpinnings of the web. Does this talk reveal all? No way! But besides asking questions and making assertions that may or may not be right, it does speak to how we can think about such things so that we might make some progress towards preparing for what is coming - whatever it is.

Biographical Information: Bill Buxton is a designer and a researcher concerned with human aspects of technology. His work reflects a particular interest in the use of technology to support creative activities such as design, film making and music. In December 2005, he was appointed a Principal Researcher at Microsoft Research. Prior to that, he was Principal of his own Toronto-based boutique design and consulting firm, Buxton Design. He also has an association with Bruce Mau Design as honorary Chief Scientist. As well, he is an Associate Professor in the Department of Computer Science at the University of Toronto.

In 1995, Buxton received the Canadian Human-Computer Communications Society Achievement Award for his contributions to research in computer graphics and human-computer interaction. He also was selected as the New Media Visionary of the Year at the 2000 Canadian New Media Awards, and the Hollywood Reporter named him one of the 10 most influential innovators in the North American film industry in 2001.

Dick Hardt (Saturday, May 12) An Identity Story Abstract Identity online is undergoing a substantive evolution as a new generation has grown up with the web and expects to do everything digitally. Accordingly, consumers are finding more commercial and social transactions migrating to the internet and citizens are benefiting from broad e-government services initiated by the public sector.

However not everything is digitally possible yet. While the web has made it easy to gather information online, users are unable to easily provide it, thus making consumer-oriented websites hungry for identity-related solutions. Additionally, most e-government services that can increase efficiency and provide better outcomes require knowledge of the citizen.

New user-centric, Identity 2.0 technologies, such as OpenID and Microsoft CardSpace are making it easy to move identity data. This fast-paced talk will provide perspectives on what is identity, where we are today and what might happen in the future.

Biographical Information: A visionary in web applications and open source software, Dick Hardt has been active in technology development for two decades. His most recent venture, Sxip Identity, is the leader in Identity 2.0, creating simple, secure, and open solutions for the next generation of internet identity. Sxip provides on-demand identity management for the enterprise and user-centric solutions that securely automate the exchange of identity data online. Prior to Sxip, Dick founded ActiveState in 1997. Under his leadership as CEO, ActiveState became a leader in tools for open source programming languages and anti-spam software and was acquired by UK-based security company Sophos in 2003.

As a successful entrepreneur and technology expert, Dick is very involved in the technology and business community, holding a board position with the Vancouver Enterprise Forum and previously sitting on the boards of the British Columbia Technology Industry Association and Ludicorp (former parent company of Flickr).

9 www2007.org

will then introduce the technical challenges and solutions for such Tutorials problems as: given a user’s search query, how do we determine which advertisement(s) to present? Of all the advertisers who wish Tuesday, May 8, 2007 to present their ads on a particular query, who should succeed? The solutions to these problems span the gamut from text mining and Full Day Tutorial retrieval, to the theory of auctions and marketplaces. We conclude by Robust Management of Web and Grid Ontologies and discussing some of the ethical, legal and privacy challenges around Metadata the responsible use of data for web advertising. Empress, 8:30am to 5:30pm (HM1) User-Centric Identity for Web Applications Presenters Oak, 8:30am to noon (HM1) Pinar Alper, University of Manchester Oscar Corcho, University of Manchester Presenter Miguel Esteban, Universidad Politécnica de Madrid Phillip Windley, Brigham Young University Sean Bechhofer, University of Manchester Abstract Carole Goble, University of Manchester Identity is foundational to Web applications. Almost all interesting David De Roure, University of Southampton Web applications use identity, even if that identity is merely Abstract psuedononymous through cookies. Good, wide-area identity systems Robust management of distributed ontologies and metadata is have not been available in the past, but recent advances suggest that an important topic of research and development in distributed they are now ready for use. These systems have been termed “user- applications, since the use of explicit knowledge and metadata centric identity systems”. underpins sharing and brings interoperation, flexibility and extensibility to them. These topics have been addressed by researchers in the User-centric identity is about working relationships and services Semantic Grid area, which is defined as an extension of the current between individuals and retailers, employers, membership bodies, and Grid where information and services are given well-defined meaning, organizations of any kind. Because user-centric identity is not about better enabling computers and people to work in cooperation. a centralized solution, or anybody’s silo, it solves different problems System development in this area has evolved from a set of pioneer than the familiar ones of providing authentication and authorization applications, with little systematic development, to a phase of services within a single organization, or federation between different systematic investigation, where more logical, consistent and ordered organizations. approaches are applied and where know-how transfer to middleware and applications has started. This tutorial will provide a survey of recent advances in user-centric identity technologies and a hands-on demonstration of how these The goal of this tutorial is to provide the attendees with both technologies can be used to enhance Web applications. theoretical foundations and hands-on experience of robust semantic- aware middleware for the management of ontologies and metadata. Cost-Effective Engineering of Web Application Product Lines In particular, attendees will: (Reuse Beyond Components: Exploiting Similarity Patterns) • Learn the principles of managing ontologies and metadata Lacombe, 8:30am to noon (HM1) in distributed applications and understand what Semantic Grid architectures, such as S-OGSA, propose; Presenter • Gain hands-on experience with distributed ontology access Stan Jarzabek, National University of Singapore and metadata management components, such as WS-DAIOnt- Abstract RDF(S), under standardisation at the Open Grid Forum, and the Web Applications (WA) are developed and maintained under tight Semantic Binding Service; schedules. Much similarity across WAs creates opportunities for • Learn how to use this architecture and these components to cutting development cost and easing evolution via reuse. This tutorial build applications. will show a practical way to exploit similarity patterns at architecture and code levels - to simplify the design of WAs, helping to meet the unique challenges of Web engineering. The approach is based Tuesday, May 8, 2007 on designing structures to represent similarity patterns in a generic Half Day Tutorials (Morning) way. Simplification of the WA design is then achieved by providing Foundations and Challenges of Web Advertising a mechanism to reuse such generic structures. We apply so-called Theatre, 8:30am to noon (CC1) mixed-strategy approach: Initial design is done using conventional Presenters methods (architectural/component design, ASP, JSP, PHP, J2EE Ricardo Baeza-Yates, Yahoo! Research or .NET). Then, we apply generative technique of XVCL to build Andrei Z. Broder, Yahoo! Research generic structures to unify similarity patterns for which conventional Prabhakar Raghavan, Yahoo! Research techniques fail to provide effective generic solutions. By applying Abstract such mixed-strategy approach, on average, we reduce conceptual This tutorial covers the science and the technology behind web complexity (and maintenance effort) of a program solution by 60%, advertising. Participants are expected to be familiar with the raising the levels of reuse by similar rates. We base the tutorial on of web search and the elements of algorithms. During the course of industrial projects and on studies that explain in detail the technical the tutorial we will review the various forms of web advertising served underpinnings of the solutions. up by advertising networks such as Google, MSN and Yahoo! We

10 Next Generation Web Services in Practice Evaluating Web Accessibility: Norquay, 8:30am to noon (HM1) Automated, Manual and User-based Testing Oak, 1:30pm to 5:00pm (HM1) Presenter Charlton Barreto, Adobe Systems, Inc. Presenters Abstract Helen Petrie, University of York As Web services continue to be realised in deployment, enterprising Christopher Power, University of York Web and application developers create new and innovative Gerhard Weber, Christian Albrechts University of Kiel applications with their data. Service-Oriented Architecture (SOA) is Abstract the next step in software development, leveraging XML technologies Building accessible sites that are vibrant, dynamic and very usable and Web services, and driven by Business Process Management requires the use of good technologies and the application of (BPM). testing. This tutorial will present a variety of methods for testing web accessibility. Through practical exercises attendees will learn how to With SOA, developers are creating mashups, applications that conduct automatic, manual and user testing. combine data from multiple services to create something new. This In the tutorial we cover the area of accessibility testing by: tutorial covers standardized Web service technologies, both the • identifying needs of blind, visually impaired, deaf, and motor current landscape and futures, and how they “mash” into SOA. impaired users The creation of a SOA mashup is chronicled, where Web service • use of assistive technologies standards are applied to enable users to create their own mashups • reviewing the Web Content Accessibility Guidelines by swapping services, or even by picking and choosing data. This is • discussing research on the accessibility of web sites demonstrated using an implementation of a Document Service Bus, • demonstrating the use and limitations of automated tools an SOA mashup that uses dynamic rendered documents as a rich • linking guidelines with manual testing techniques user interface and is entirely driven by these Web technologies. • demonstrating tools to support manual testing techniques • enabling participants to apply methods for evaluation with Tuesday, May 8, 2007 disabled users, and • providing an outlook to newer web technologies and their Half Day Tutorials (Afternoon) challenges for accessibility. Learning to Rank in Vector Spaces and Social Networks Theatre, 1:30pm to 5:00pm (CC1) Attendees of the tutorial will be able to link accessibility with usability, as our research and experience with real-world Web sites has shown Presenter that an accessible site is more likely to be a usable site. Soumen Chakrabarti, Indian Institute of Technology, Bombay Abstract Deploying Web-scale Mash-ups by Linking Microformats We will study and associated numerical techniques and the Semantic Web to automatically learn ranking functions for entities represented as Norquay, 1:30pm to 5:00pm (HM1) feature vectors as well as nodes in a social network. In the feature- vector scenario, an entity, e.g., a document x, is mapped to a feature Presenters vector in a d-dimensional space, and we have to search for a weight Dan Connolly, Massachusetts Institute of Technology vector. This case corresponds to in the vector Harry Halpin, University of Edinburgh space model. Training data consists of a partial order of preference Murray Maloney, Muzmo Inc. among entities. We will study recent Bayesian and maximum-margin Abstract approaches to solving this problem, including recent efficient linear- Recently, a plethora of technologies associated with the “Web 2.0” time approximate algorithms. We will consider various ranking have been deployed. Among these technologies, “microformats” performance measures and how some of them create complications provide an easy-to-use way to structure conventional HTML markup for learning algorithms. In the graph node ranking scenario, we will with semantics, as shown by the deployment of microformats on briefly review Pagerank, generalize it to arbitrary Markov conductance popular services like LinkedIn and Upcoming.org. This presents a rich matrices, and consider the problem of learning conductance store of data for Web mash-up applications, if only the data could be parameters from partial orders between nodes. In another class of easily extracted from HTML and could be integrated across multiple formulation, the graph does not establish Pagerank or prestige-flow domains. The Resource Description Framework (RDF) provides relationships between nodes, but encourages a certain smoothness semantics for sharing data across sources and domains, supporting between the scores of neighboring nodes. Some of these techniques Web-scale mash-ups. have been used by Web search companies with very large query logs. We will review some of the issues and experience with applying GRDDL presents an easy-to-use way for authors of HTML and XML the theory to practical systems. If time permits, we will look at general to have clients extract RDF from their data, and so serves among connections between score stability as against rank stability, and the other things as a “low-cost” upgrade path to convert microformat connection between the stability of a score/rank-learning algorithm data to RDF in order to integrate diverse data sources. Furthermore, and its power to generalize to unforeseen test data. we will cover how GRDDL can be used in a variety of XML contexts for data integration using real-world examples. This hands-on tutorial will present people a hands-on introduction to microformats, mash- ups, RDF, GRDDL, and ways of embedding RDF directly in HTML like RDFa.

11 www2007.org

Web Workloads: Characterization, Modeling and Application Thursday, May 10, 2007 Lacombe, 1:30pm to 5:00pm (HM1) Half Day Tutorial (Afternoon) Presenters Model Driven Semantic Web Engineering Virgilio Almeida, Federal University of Minas Gerais Beatty, 1:30pm to 5:00pm (CC2) Daniel Menasce, George Mason University Abstract Presenters The study and design of Web applications and services require good Dragan Gasevic, Simon Fraser University models of the workloads to which these applications are subject. Gerd Wagner, Brandenburg University of Technology at Cottbus, The Web is a complex system with hundreds of millions of users Germany demanding services from thousands of applications. In order to Abstract understand the Web, one needs first to understand the workload Model Driven Engineering (MDE) and the Semantic Web represent associated with their most popular applications, such as email, two key technologies with a far-reaching vision for the future of peer-to-peer, e-business, search engines, streaming media, etc. software engineering and Web engineering. The main promise of This tutorial presents a comprehensive study of real Web workloads. MDE is to raise the level of abstraction from technology-platform- It shows the main properties of these workloads and discusses specific concepts to the higher levels of platform-independent and the invariants across different types of workloads. It introduces computation-independent modeling. The Semantic Web vision methodologies and techniques used in workload characterization starts from another perspective: sharing data, resources and and modeling. Constructing a model involves tradeoffs between knowledge between parties that belong to different organizations, realism and complexity. The tutorial shows how characterization different cultures, and/or different communities. Ontologies and rules techniques have been used to capture the most relevant aspects play the main role in the Semantic Web for publishing community of Web workloads while keeping the model as simple as possible. vocabularies and policies, for annotating resources and for turning A major goal of this tutorial is to show how workload models can be Web applications into inference-enabled collaboration platforms. used to design efficient Web systems and services. The attendees of the tutorial will be exposed to the most important techniques for The main goal of this tutorial is to give an introduction into state-of- characterizing and modeling Web workloads. the-art Web engineering methods based on the principles, models, and technologies of both MDE and the Semantic Web. The tutorial Wednesday, May 9, 2007 starts from the basics of the Semantic Web and MDE (e.g., ontology languages, modeling languages, model transformations), and then Half Day Tutorial (Afternoon) explores how they can be employed in various stages of Web Semantic Digital Libraries engineering. Coleman, 1:30pm to 5:00pm (CC2) Friday, May 11, 2007 Presenters Sebastian Ryszard Kruk, National University of Ireland Half Day Tutorial (Afternoon) Stefan Decker, National University of Ireland Semantic Web: Bernhard Haslhofer, Research Studios Austria Technologies and Applications for the Real-World Predrag Knezevic, Fraunhofer IPSI Institute Coleman, 1:30pm to 5:00pm (CC2) Sandy Payette, Cornell University Abstract Presenters The aim of this tutorial is to educate attendees on the applications of Amit Sheth, Wright State University Semantic Web and Social Networking (Web 2.0) technologies in digital Susie Stephens, Eli Lilly library systems. These technologies include metadata management, Abstract and browsing, personalized and community-aware The Semantic Web has now reached a level of maturity that allows services, and semantically empowered federations of digital libraries. large enterprises to adopt the technology. The standards landscape The semantic digital libraries can be used in enterprise scale systems is increasingly well developed, with RDF and OWL already being W3C such as knowledge management systems, medical records systems, standard recommendations, and GRDDL, SPARQL and SAWSDL legal research systems and others will be discussed at some depth. looking likely to follow shortly. There is also an increasing array of These applications can benefit in manners which directly impact the robust software products that use Semantic Web technology, which ROI for the effort of including semantic encoding and metadata into greatly assists with any implementations. an enterprises digital library based systems and services. After this tutorial, the audience will be able to start using existing semantic This tutorial will focus on three areas. Firstly, it will provide a brief digital libraries or apply Semantic Web technologies to digital library introduction to the core Semantic Web standards, including RDF, systems. OWL, SPARQL and SAWSDL. It will then provide a comprehensive survey of the many Semantic Web tools that are currently available. The final section and the primary component of the tutorial will describe several real world implementations of applications enabled by the Semantic Web technologies.

12 C\W_cScaS`a#;7::7=< ASSYW\UVc[O\Y\]eZSRUS';7::7=< /VVO[][S\ba #;7::7=<

/`Sg]c`WRSOaPWUS\]cUVb]Q]\\SQb^S]^ZSeV]eO\bb]Y\]eWbOZZeWbV^S]^ZSeV]R]-

– %GOV]]7\Q/ZZ`WUVba`SaS`dSR QO`SS`agOV]]Q][ www2007.org

Health Care and Life Sciences Data Integration for the Workshops Semantic Web Frontenac, 8:30am to 5:00pm (HM1)

Tuesday, May 8, 2007 Organizers Kei Cheung, Yale University Full Day Workshops Huajun Chen, Zhejiang University Yimin Wang, University of Karlsruhe Adversarial Information Retrieval on the Web (AIRWeb 2007) Joanne Luciano, Harvard Medical School Shaughnessy, 8:30am to 5:00pm (CC2) Susie Stephens, Eli Lilly Vipul Kashyap, Partners HealthCare System Organizers Workshop Website Carlos Castillo, Yahoo! Research http://neuroweb.med.yale.edu/hcls/Welcome.htm Kumar Chellapilla, Papers Brian Davison, Lehigh University The State of the Nation in Data Integration Workshop Website Carole Goble http://airweb.cse.lehigh.edu/2007/ Dynamic Integration of Medical Ontologies in Large Scale Full Papers Vit Novacek, Loredana Laera, and Siegfried Handschuh A Taxonomy of JavaScript Redirection Spam An Experiment on Using Temporal Ontologies to Reason about Kumar Chellapilla and Alexey Maykov Localization and Transport of Fungal Proteins New Metrics for Reputation Management in P2P Networks Michel Nathan and Gregory Butler Debora Donato, Mario Paniccia, Maddalena Selis, Carlos A Genome – Phenome Integrated Approach for Mining Castillo, Giovanni Cortese, and Stefano Leonardi Disease-Causal Genes using Semantic Web Using Spam Farm to Boost PageRank Ranga Chandra Gudivada, Xiaoyan Qu, Anil Jegga, Eric Ye Du, Yaoyun Shi, and Xin Zhao Neumann, and Bruce Aronow Combating Spam in Tagging Systems Bio2RDF: Towards a Mashup to Build Bioinformatics Georgia Koutrika, Frans Effendi, Zoltan Gyongyi, Paul Knowledge System Heymann, and Hector Garcia-Molina Francois Belleau, Marc-Alexandre Nolin, Nicole Tourigny, Splog Detection Using Self-similarity Analysis on Blog Philippe Rigault, and Jean Morissette Temporal Dynamics An Overiew of the SWAN 1.0 Discourse Ontology Yu-Ru Lin, Hari Sundaram, Yun Chi, Junichi Tatemura, and Paolo Ciccarese, Elizabeth Wu, and Tim Clark Belle Tseng An Experiment in Integrating Large Biomedical Knowledge Measuring Similarity to Detect Qualified Links Resources with RDF: Application to Associating Genotype and Xiaoguang Qi, Lan Nie, and Brian Davison Phenotype Information Improving Web Spam Classification using Rank-time Features Satya Sahoo, Olivier Bodenreider, Kelly Zeng, and Amit Sheth Krysta Svore, Qiang Wu, Chris Burges, and Aaswath Raman Ontology-based Data Quality Enhancement for Drug Extracting Link Spam using Biased Random Walks from Spam Olivier Cure and Jean-Paul Giroud Seed Sets Towards a Semantic Knowledge Base for Yeast Biologists Baoning Wu and Kumar Chellapilla Natalia Villanueva-Rosales, Kevin Osbahr, and Michel Computing Trusted Authority Scores in Peer-to-Peer Web Dumontier Search Networks Epoch Clinical Trial Ontologies to Support Clinical Trials Josiane Xavier Parreira, Debora Donato, Carlos Castillo, and Management Gerhard Weikum Ravi Shankar, Susana Martins, Martin O’Connor, David Parrish, Transductive Link Spam Detection and Amar Das Dengyong Zhou, Christopher Burges, and Tao Tao Adaptive Medical Workflow Using BPEL Process and Short Papers Ontological Knowledge Base Web Spam Detection via Commercial Intent Analysis Amir Hedayati, Jiangbo Dang, Ken Hampel, and Andras Benczur, Istvan Biro, Karoly Csalogany, and Tamas Candemir Toklu Sarlos Improving Web Spam Classifiers Using Link Structure I3: Identity, Identifiers, Identifications -- Entity-Centric Qingqing Gan and Torsten Suel Approaches to Information and Knowledge Management A Large-Scale Study of Link Spam Detection by Graph on the Web Algorithms McKenzie, 8:30am to 5:00pm (HM1) Hiroo Saito, Masashi Toyoda, Masaru Kitsuregawa, and Kazuyuki Aihara Organizers Paulo Bouquet, University of Trento, Italy Heiko Stoermer, University of Trento, Italy Giovanni Tummarelo, Universita Politecnica delle Marche, Italy Harry Halpin, University of Edinburgh

14 Workshop Website Papers http://okkam.dit.unitn.it/i3/ Functional Faceted Analysis Papers Bang Viet Nguyen and Min-Yen Kan Profiling Topics on the Web A Study of Mobile Search Queries in Japan Aditya Sehgal and Padmini Srinivasan Ricardo Baeza-Yates, Georges Dupret, and Javier Velasco Referent Tracking and its Applications User 4XXXXX9: Anonymizing Query Logs Werner Ceusters and Barry Smith Eytan Adar Towards Ontology-based Disambiguation of Geographical Comparing Click Logs and Editorial Labels for Training Query Identifiers Rewriting Raphael Volz, Joachim Kleb, and Wolfgang Mueller Wei Vivian Zhang and Rosie Jones Performing Object Consolidation on the Semantic Web Data Towards Privacy-Preserving Query Log Publishing Graph Li Xiong and Eugene Agichtein Aidan Hogan, Andreas Harth, and Stefan Decker Position Paper: Access to Query Logs – An Academic A Grounded Ontology for Identity and Reference of Web Researcher’s Point of View Resources Judit Bar-Ilan Aldo Gangemi and Valentina Presutti Query Logs Alone are not Enough Identity: How to name it, How to find it Carrie Grimes, Diane Tang, and Daniel M. Russell Christo Dichev, Darina Dicheva, and Jan Fischer Position Paper: Preserving the Collective Expressions of the OKKAM: Enabling a Web of Entities Human Consciousness Paolo Bouquet, Heiko Stoermer, and Daniel Giacomuzzi Bernard J. Jansen Web Evaluation using Clickthrough Data and a MobEA V - Mobile Web in the Developing World User Model Palliser, 8:30am to 5:00pm (HM1) Georges Dupret, Vanessa Murdock, and Benjamin Piwowarski Can We Find Common Rules of Browsing Behavior? Organizers Ganesan Velayathan and Seiji Yamada Daniel Appelquist, Vodafone People’s Query Logs: Personal Information Management Rittwik Jana, AT&T Labs Research Amanda Spink and Bernard Jansen Workshop Website http://www.research.att.com/~rjana/mobea2007.htm Social and Collaborative Construction of Structured Knowledge Papers Alberta, 8:30am to 5:00pm (HM2) Using CAM-equipped Mobile Phones for Procurement and Quality Control at a Rural Coffee Cooperative Organizers Yael Schwartzman and Tapan Parikh Harith Alani, University of Southampton Content Analysis Techniques to Ease Browsing with Handhelds Natasha Noy, Stanford University Jalal Mahmud, Yevgen Borodin, and I.V. Ramakrishnan Gerd Stumme, University of Kassel Mobile Web in the Developing World: Position Paper Peter Mika, Free University, Amsterdam Ken Banks York Sure, University of Karlsruhe Web – “Greatest Equalizer” for the Developing World Denny Vrandecic, University of Karlsruhe Asoke Talukder Workshop Website Library of Congress Outreach to the Developing World: The http://km.aifb.uni-karlsruhe.de/ws/ckc2007/ World Digital Library Initiative Papers Justin Thorp Ontology Maturing: A Collaborative Web 2.0 Approach to A Collaborative and Feature-based Approach to Context- Ontology Engineering Sensitive Service Discovery Simone Braun, Andreas Schmidt, and Andreas Walter Julia Kuck and Frank Reichartz C-ODO: An OWL Meta-model for Collaborative Ontology Devices to Access Internet in Developing Countries Design Guillermo Esteve and Angel Machin Aldo Gangemi, Valentina Presutti, Carola Catenacci, Jos SOVoIP: True Convergence of Data and Voice Network Lehmann, and Malvina Nissim Mohammed Jubaer Arif, Shanika Karunasekera, and Santosh Promotion of Ontological Comprehension: Exposing Terms and Kulkarni Metadata with Web 2.0 Andrew Gibson, Katy Wolstencroft, and Robert Stevens Query Log Analysis: Social and Technological Challenges Adding Value to Biodiversity Images through Community Beatty, 8:30am to 5:00pm (CC2) Annotation Greg Riccardi Organizers Formalization, User Strategy, and Interaction Design: Users’ Einat Amitay, IBM Research Behaviour with Discourse Tagging Semantics G. Craig Murray, University of Maryland Bertrand Sereno, Simon Buckingham Shum, and Enrico Motta Jaime Teevan, Microsoft Research Improving Ontology Recommendation and Reuse in WebCORE Workshop Website by Collaborative Assessments http://querylogs2007.webir.org/ Ivan Cantador, Miriam Fernandez, and Pablo Castells

15 www2007.org

Fostering Knowledge Evolution through Community-based The Effect on Click-through of Combining Sponsored and Participation Non-sponsored Search Engine Results in a Single Listing Domenico Gendarmi, Fabio Abbattista, and Filippo Lanubile Bernard J. Jansen and Amanda Spink Computer-Supported Collaborative Knowledge Modeling in Incentive-Compatible Multi-Armed Bandit Mechanism Ecology Rica Gonen and Elan Pavlov Deana Pennington, Joshua Madin, Ferdinando Villa, and Stochastic Models for Budget Optimization in Search-Based Ioannis Athanasiadis Advertising Accepted Demos S. Muthukrishnan, Martin Pal, and Zoya Svitkina OntoWiki: A Tool for Social, Semantic Collaboration Is Efficiency Expensive? Sören Auer, Sebastian Dietzold, Jens Lehmann, and Thomas Tim Roughgarden and Mukund Sundararajan Riechert Empirical Price Modeling for Sponsored Search Collaborative Protege Kuzman Ganchev, Ryan Gabbard, Alex Kulesza, Qian Liu, Tania Tudorache and Natasha Noy Jinsong Tan, and Michael Kearns Distributed Construction of Ontologies Using Hozo Auctions with Revenue Guarantees for Sponsored Search Kouji Kozaki, Eiichi Sunagawa, Yoshinobu Kitamura, and Zoe Abrams and Arpita Ghosh Riichiro Mizoguchi Dynamics of Strategic Manipulation in Ad-Word Auction Organizing Publications and Bookmarks in BibSonomy Tian-Ming Bu, Xiaotie Deng, and Qi Qi Robert Jaschke, Miranda Grahl, Andreas Hotho, Beate Krause, Search Advertising Based Promotion Strategies for Christoph Schmitz, and Gerd Stumme Online Retailers SOBOLEO -- Social Bookmarking and Lightweight Engineering Amit Mehra of Ontologies Cost of Conciseness in Sponsored Search Auctions Valentin Zacharias and Simone Braun Zoe Abrams, Arpita Ghosh, and Erik Vee Collaboratively Building Structured Knowledge with DBin: from Keyword Generation for Search Engine Advertising using del.icio.us tags to an “RDFS Folksonomy” Semantic Similarity between Terms Giovanni Tummarello and Christian Morbidoni Vibhanshu Abhishek Improving Ontology Recommendation and Reuse in WebCORE by Collaborative Assessments Tagging and Metadata for Social Information Organization Ivan Cantador, Miriam Fernandez, and Pablo Castells Coleman, 8:30am to 5:00pm (CC2) Adding Value to Biodiversity Images Through Community Annotation in the Morphbank System Organizers Greg Riccardi Scott Golder, HP Labs BOWiki - A Collaborative Annotation and Ontology Curation Frank Smadja, RawSugar Framework Workshop Website Michael Backhaus, Janet Kelso, Joshua Bacher, Heinrich http://www2007.redlog.net/ Herre, Robert Hoehndorf, Frank Loebe, and Johann Visagie Papers Learning User Profiles from Tagging Data and Leveraging them Sponsored Search Auctions for Personal(ized) Information Access Champlain, 8:30am to 5:00pm (HM1) Elke Michlmayr and Steve Cayzer Network Properties of Folksonomies Organizers Christoph Schmitz, Miranda Grahl, Andreas Hotho, Gerd Gagan Aggarwal, Google Stumme, Ciro Cattuto, Andrea Baldassarri, Vittorio Loreto, and Kartik Hosanagar, University of Pennsylvania Vito D. P. Servedio David Pennock, Yahoo! Emerging Motivations for Tagging: Expression, Performance, Michael Schwarz, Yahoo! and Activism Rakesh Vohra, Northwestern University Alla Zollers Workshop Website Applying Collaborative Tagging to E-Learning http://opim-sun.wharton.upenn.edu/ssa3/index.html Scott Bateman, Christopher Brooks, Gord McCalla, and Peter Papers Brusilovsky Dynamic Efficient Auctions Tag-Cloud Drawing: Algorithms for Cloud Visualization Dirk Bergemann and Juuso Valimaki Owen Kaser and Daniel Lemire A Simulation Framework for Evaluating Designs for Sponsored SemKey: A Semantic Collaborative Tagging System Search Markets Andrea Marchetti, Maurizio Tesconi, Francesco Ronzano, Soam Acharya, Prabhakar Krishnamurthy, Ketan Deshpande, Marco Rosella, and Salvatore Minutoli Tak Yan, and Chi-Chao Chang Towards Federated Web2.0 Sites: The TAGMAS Approach Budget Constrained Bidding in Keyword Auctions and Online Jon Iturrioz, Oscar Diaz, and Cristobal Arellano Knapsack Problems Deeparnab Chakrabarty, Yunhong Zhou, and Rajan Lukose Sponsored Search with Contexts Eyal Even-Dar, Michael Kearns, and Jennifer Wortman

16 Defining how business gets done on the Web

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP Finnegan Henderson integrates business, science, and law to help companies protect their intellectual property, extract maximum value from IP assets, and reduce the risk of infringing the rights of others. Our diverse experience includes nearly every aspect of Web businesses:

• Patenting software inventions • Assertion of and/or defense against software and Internet technology patents • Protection of software under U.S. copyright law • Preparation and negotiation of agreements for software and other technology • Web hosting and website development agreements • Content development and licensing

For more information contact: Jeffrey A. Berkowitz at [email protected].

Washington, DC N Atlanta, GA N Cambridge, MA N Palo Alto, CA N Reston, VA Brussels N Taipei N Tokyo

www.finnegan.com www2007.org

Printing and Shipping On-Site Logistics WWW2007 is pleased to partner with The UPS Store for all your on- site printing, copying, and shipping needs. Look for their stand in the Van Horne Foyer. Registration The WWW2007 registration desk is in the Van Horne Foyer in the Exhibition Conference Centre (CC2). The registration desk will be open as The WWW2007 sponsor Exhibition Hall is housed in Van Horne C. follows: The exhibition will be open as follows: • Monday, May 7: 1:00pm-6:00pm • Wednesday, May 9: 10:00am-8:00pm • Tuesday, May 8: 7:00am-5:00pm • Thursday, May 10: 10:00am-5:00pm • Wednesday, May 9: 7:00am-5:00pm • Friday, May 11: 10:00am-5:00pm • Thursday, May 10: 7:30am-5:00pm • Friday, May 11: 7:30am-5:00pm Exhibitors should plan to set up on Tuesday, and remove their display • Saturday, May 12: 8:00am-noon Friday after 6:00pm.

Wireless Internet Exhibition Booths WWW2007 has contracted with MyCanopy to provide Wireless • AOL Internet service throughout all meeting areas during the conference. • Microsoft Technical support for the network is provided by MyCanopy, with • SAP the cooperation of Motorola, Enmax, Axia, the Alberta Supernet, the • Ask.com University of Calgary, and the Fairmont Banff Springs Hotel. • Google • University of Calgary The SSID for the wireless network should be WWW2007. This • Vodafone network is intended for the use of conference delegates only. • eBay Research Labs • iCORE Internet Cafe • Sirma Group For those without a wireless laptop, a small Internet Café is set up on • Taylor and Francis the lower level of the Conference Centre, by the Theatre lobby. • University of Southampton (ECS) • WSRI • W3C • WWW2008 / IW3C2 Gold Sponsors

Microsoft Research is dedicated to conducting both basic and applied SAP is the world’s leading provider of business software. Today, research in computer science and software engineering. Its goals are more than 38,000 customers in more than 120 countries run to enhance the user experience on computing devices, reduce the SAP® applications-from distinct solutions addressing the needs cost of writing and maintaining software, and invent novel computing of small businesses and midsize companies to suite offerings for technologies. Microsoft Research employs more than 700 people in global organizations. Powered by the SAP NetWeaver® platform five labs located in Redmond, Wash.; Silicon Valley, Calif.; Cambridge, to drive innovation and enable business change, SAP software England; Beijing, China; and Bangalore, India. More information can helps enterprises of all sizes around the world improve customer be found at www.research.microsoft.com. relationships, enhance partner collaboration and create efficiencies across their supply chains and business operations. SAP solution Attracting more than 465 million unique users worldwide per month, portfolios support the unique business processes of more than 25 MSN® is a world leader in delivering compelling programmed content industries, including high tech, retail, financial services, healthcare experiences to consumers and online advertising opportunities to and the public sector. businesses worldwide. , a new set of personal Internet services and software, is designed to bring together in one place all the relationships, information and interests people care about most. MSN and Windows Live will be offered alongside each other as complementary services. Windows Live is available at www.live.com. MSN is located on the Web at www.msn.com. MSN worldwide sites Yahoo! Inc. is a leading global Internet brand and one of the most are located at www..com/worldwide.ashx. trafficked Internet destinations worldwide. Yahoo!’s mission isto connect people to their passions, their communities, and the world’s knowledge. Yahoo! is headquartered in Sunnyvale, California. Yahoo! is located on the Web at www.yahoo.com

18 K_\:Xc^Xip?\iXc[;`^`kXc<[`k`fe kiXejcXk\j]ifd\idXe @kXc`Xe AXgXe\j\ Bfi\Xe Gfikl^l\j\ Iljj`Xe JgXe`j_

K\okkiXejcXk`fe1aljkfe\f]k_\]\Xkli\jf]k_\ mXjkcp`dgifm\[fec`e\m\ij`fef]k_\:Xc^Xip?\iXc[% I\X[`e^Xe\njgXg\i_Xje\m\iY\\e\Xj`\i

›I\X[fec`e\fi[fnecfX[X[`^`kXci\gc`ZXf]pflie\njgXg\i ›I\]\i\eZ\k_\cXjk.[Xpjf][`^`kXccpXiZ_`m\[\[`k`fej›DX^e`]ppflikpg\Xe[^iXg_`Zj ›?\XiXepjkfipi\X[Xcfl[n`k_k_\Xl[`f]leZk`fe›KiXejcXk\jkfi`\j`ekf()[`]]\i\ekcXe^lX^\j ›JXm\Xe[j\e[pfli]Xmfli`k\Xik`Zc\j›J\XiZ_((c\X[`e^:XeX[`Xee\njgXg\ij

Kip`kefn]fi=I<<Xk nnn%ZXc^Xip_\iXc[%Zfd&[`^`kXc 8cnXpj]i\\kf]lccn\\b:Xc^Xip?\iXc[jlYjZi`Y\ij%.$[Xp]i\\ki`Xc]fi\m\ipfe\\cj\% www2007.org

Tuesday, May 8, 2007:

Room Shaughnessy Beatty Coleman Theatre New Brunswick Alberta Cascade

Location CC2 CC2 CC2 CC1 HM2 HM2 HM2

8:30am to AIRWeb 2007: Query Log Tagging and Foundations and Web Social and W3C AC 10:00am Adversarial Analysis: Metadata Challenges of Accessibility Collaborative Meeting Information Social and for Social Web Advertising (W4A) Construction (Day 2 of 2) Retrieval on the Technological Information (Half-day tutorial) Conference of Structured Web Challenges Organization (Day 2 of 2) Knowledge (Full-day (Full-day (Full-day (Full-day workshop) workshop) workshop) Workshop)

break

10:30am to AIRWeb 2007: Query Log Tagging and Foundations and Web Social and W3C AC noon Adversarial Analysis: Metadata Challenges of Accessibility Collaborative Meeting Information Social and for Social Web Advertising (W4A) Construction (cont’d) Retrieval on the Technological Information (cont’d) Conference of Structured Web Challenges Organization (cont’d) Knowledge (cont’d) (cont’d) cont’d) (cont’d)

lunch break

1:30pm to AIRWeb 2007: Query Log Tagging and Learning to Web Social and W3C AC 3:00pm Adversarial Analysis: Metadata Rank in Vector Accessibility Collaborative Meeting Information Social and for Social Spaces and (W4A) Construction (cont’d) Retrieval on the Technological Information Social Networks Conference of Structured Web Challenges Organization (Half-day (cont’d) Knowledge (cont’d) (cont’d) (cont’d) Tutorial) (cont’d)

break

3:30pm to AIRWeb 2007: Query Log Tagging and Learning to Web Social and W3C AC 5:00pm Adversarial Analysis: Metadata Rank in Vector Accessibility Collaborative Meeting Information Social and for Social Spaces and (W4A) Construction (cont’d) Retrieval on the Technological Information Social Networks Conference of Structured Web Challenges Organization (cont’d) (cont’d) Knowledge (cont’d) (cont’d) (cont’d) (cont’d)

Evening Web History Opening Reception (5:00pm to 8:00pm, starting in Riverview Lounge)

20 Building the Web

Room Shaughnessy Beatty Coleman Theatre New Brunswick Alberta Cascade Oak Norquay Frontenac Champlain McKenzie Palliser Empress Lacombe

Location CC2 CC2 CC2 CC1 HM2 HM2 HM2 HM1 HM1 HM1 HM1 HM1 HM1 HM1 HM1

8:30am to AIRWeb 2007: Query Log Tagging and Foundations and Web Social and W3C AC User-Centric Next Generation Health Care and Sponsored I3: Identity, MobEA V: Robust Cost-Effective 10:00am Adversarial Analysis: Metadata Challenges of Accessibility Collaborative Meeting Identity for Web Web Services in Life Sciences Search Identifiers, Mobile Web in Management of Engineering of Information Social and for Social Web Advertising (W4A) Construction (Day 2 of 2) Applications Practice Data Integration Auctions Identifications the Developing Web and Grid Web Application Retrieval on the Technological Information (Half-day tutorial) Conference of Structured (Half-day (Half-day for the Semantic (Full-day (Full-day World Ontologies and Product Lines Web Challenges Organization (Day 2 of 2) Knowledge Tutorial) Tutorial) Web Workshop) Workshop) (Full-day Metadata (Half-day (Full-day (Full-day (Full-day (Full-day (Full-day Workshop) (Full-day Tutorial) Tutorial) workshop) workshop) workshop) Workshop) Workshop)

break

10:30am to AIRWeb 2007: Query Log Tagging and Foundations and Web Social and W3C AC User-Centric Next Generation Health Care and Sponsored I3: Identity, MobEA V: Robust Cost-Effective noon Adversarial Analysis: Metadata Challenges of Accessibility Collaborative Meeting Identity for Web Web Services in Life Sciences Search Identifiers, Mobile Web in Management of Engineering of Information Social and for Social Web Advertising (W4A) Construction (cont’d) Applications Practice Data Integration Auctions Identifications the Developing Web and Grid Web Application Retrieval on the Technological Information (cont’d) Conference of Structured (cont’d) (cont’d) for the Semantic (cont’d) World Ontologies and Product Lines Web Challenges Organization (cont’d) Knowledge Web (cont’d) Metadata (cont’d) (cont’d) (cont’d) cont’d) (cont’d) (cont’d) (cont’d)

lunch break

1:30pm to AIRWeb 2007: Query Log Tagging and Learning to Web Social and W3C AC An Integrated Deploying Web- Health Care and Sponsored I3: Identity, MobEA V: Robust Web Workloads: 3:00pm Adversarial Analysis: Metadata Rank in Vector Accessibility Collaborative Meeting Approach to scale Mash- Life Sciences Search Identifiers, Mobile Web in Management of Characterization, Information Social and for Social Spaces and (W4A) Construction (cont’d) Evaluating Web ups by Linking Data Integration Auctions Identifications the Developing Web and Grid Modeling and Retrieval on the Technological Information Social Networks Conference of Structured Accessibility: Microformats for the Semantic (cont’d) World Ontologies and Application Web Challenges Organization (Half-day (cont’d) Knowledge Automated, and the Web (cont’d) Metadata (Half-day (cont’d) (cont’d) (cont’d) Tutorial) (cont’d) Manual and Semantic Web (cont’d) (cont’d) Tutorial) User-based (Half-day Testing Tutorial) (Half-day Tutorial) break

3:30pm to AIRWeb 2007: Query Log Tagging and Learning to Web Social and W3C AC An Integrated Deploying Web- Health Care and Sponsored I3: Identity, MobEA V: Robust Web Workloads: 5:00pm Adversarial Analysis: Metadata Rank in Vector Accessibility Collaborative Meeting Approach to scale Mash- Life Sciences Search Identifiers, Mobile Web in Management of Characterization, Information Social and for Social Spaces and (W4A) Construction (cont’d) Evaluating Web ups by Linking Data Integration Auctions Identifications the Developing Web and Grid Modeling and Retrieval on the Technological Information Social Networks Conference of Structured Accessibility: Microformats for the Semantic (cont’d) (cont’d) World Ontologies and Application Web Challenges Organization (cont’d) (cont’d) Knowledge Automated, and the Web (cont’d) Metadata (cont’d) (cont’d) (cont’d) (cont’d) (cont’d) Manual and Semantic Web (cont’d) (cont’d) User-based (cont’d) Testing (cont’d) Evening Web History Opening Reception (5:00pm to 8:00pm, starting in Riverview Lounge)

21 www2007.org

Hotel Mezzanine First Floor (HM1)

Conference Centre First Floor (CC1)

22 Hotel Mezzanine Second Floor (HM2)

Conference Centre Second Floor (CC2)

23 www2007.org

Wednesday, May 9, 2007: The Global Web

Room VanHorne Shaughnessy Beatty Coleman Theatre Petrak New Brunswick Alberta Cascade

Location CC2 CC2 CC2 CC2 CC1 HM2 HM2 HM2 HM2

8:30am WWW2007 Opening Ceremonies and Plenary Speaker: Tim Berners-Lee (MIT/W3C) to The Two Magics of Web Science (Van Horne Ballroom) 10:00am

break 10:30am Sponsor Web History Technology Web Web History XML and Web Search W3C Track to noon Exhibition Track for Developing Science Exhibit Data 1 of 7 Making Hall Pioneers of Regions (panel) 1 of 2 (Search Mobile Web (Van Horne the Web and 1 of 2 (Querying and Potpourri) Browsing C) E-Commerce (Communication Transforming 3 papers Better in Developing XML) Regions) 3 papers 3 papers lunch break 1:30pm Sponsor Web History Web Delivery Semantic Industry Web History Browsers and Search W3C Track to Exhibition Track Models for Digital Talks Exhibit User Interfaces 2 of 7 Rich Web 3:00pm Hall (cont’d) Developing Libraries Search and (cont’d) 1 of 2 (Crawlers) Applications (cont’d) Regions (panel) (Half-day Data (Personalization) 3 papers tutorial) 3 papers

break

3:30pm Sponsor Web History Technology Semantic Web History Browsers and Search W3C Track to Exhibition Track for Developing Digital Exhibit User Interfaces 3 of 7 The Future 5:00pm Hall (cont’d) Regions Libraries (cont’d) 2 of 2 (Smarter (Web of the Web (cont’d) 2 of 2 (cont’d) Browsing) Graphs) Page (Networking 3 papers 3 papers Issues in the Web) 3 papers Evening WWW2007 Welcome Reception (Van Horne Ballroom and Foyer, 6:00pm to 8:00pm)

24 Wednesday, May 9, 2007: The Global Web Thursday, May 10, 2007: Mining the Web

Room VanHorne Shaughnessy Beatty Coleman Theatre Petrak New Brunswick Alberta Cascade

Location CC2 CC2 CC2 CC2 CC1 HM2 HM2 HM2 HM2

8:30am WWW2007 Announcements and Plenary Speaker: Prabhakar Raghavan (Yahoo! Research) to Web N.0: What sciences will it take? (Van Horne Ballroom) 10:00am

break 10:30am Sponsor Performance Pervasive Web Semantic Industry Web History XML and Web Data W3C Track to noon Exhibition & Scalability and Mobility Web with Talk Exhibit Data Mining Advances Hall 1 of 2 1 of 1 (Pervasive Data (panel) Web 2 of 2 (Parsing, 1 of 5 in Semantic (Van Horne (Scalable Web and Search Normalizing, (Identifying Web C) Systems for Mobility) and Storing Structure Dynamic 3 papers XML) in Web Content) 3 papers Pages) 3 papers 3 papers lunch break 1:30pm Sponsor Performance Model Driven Developers Industry Web History Industrial Data W3C Track to Exhibition and Semantic Web Track Panel Exhibit Practice and Mining Security and 3:00pm Hall Scalability Engineering Programming Mobile (cont’d) Experience 2 of 5 Usability on (cont’d) (panel) (Half-day the Web Web and 1 of 1 (IPE) (Mining the Web Tutorial) Ajax 3 papers Textual Data) 3 papers

break

3:30pm Sponsor Performance Model Driven Developers Web Web History W3C Track to Exhibition & Scalability Semantic Web Track Search Exhibit Metadata 4 of 7 Web of 5:00pm Hall 2 of 2 Engineering Web Tools Privacy (cont’d) Standards in (Search Services for (cont’d) (Performance (cont’d) Issues Semantic Web Quality and Enterprise Engineering (panel) (panel) Precision) Computing of Web 3 papers Applications) 3 papers Evening WWW2007 Banquet (6:00pm to 9:00pm) (offsite at Brewster’s MountView Barbecue; bus transportation provided, starting at 5:30 pm)

25 www2007.org

Friday, May 11, 2007: Weaving the Web

Room VanHorne Shaughnessy Beatty Coleman Theatre Petrak New Alberta Cascade Brunswick Location CC2 CC2 CC2 CC2 CC1 HM2 HM2 HM2 HM2

8:30am WWW2007 Announcements and Plenary Speaker: Bill Buxton (Microsoft Research/University of Toronto) to Design for the World Narrow Web (Van Horne Ballroom) 10:00am

break 10:30am Sponsor Web Searching Developers Industry Web History Semantic Web Data Mining W3C Track to noon Exhibition Engineering Personal Track Talks Exhibit 1 of 5 3 of 5 (Similarity A Multimodal Hall 1 of 2 (Web Content (panel) Linked Data Web and (Applications) Search) Web to (Van Horne Modeling) Patents 3 papers 3 papers Expand C) 3 papers Universal Access lunch break 1:30pm Sponsor Web Web Services Semantic Developers Web History Semantic Web Search W3C Track to Exhibition Engineering 1 of 2 Web: Track Exhibit 2 of 5 5 of 7 Architectural 3:00pm Hall 2 of 2 (End-User (Orchestration Technologies Emerging (cont’d) (Similarity and (Advertisements Integration (cont’d) Perspective and and and Web Extraction) and Click Measurement Choreography) Applications Platforms 3 papers Estimates) in Web 3 papers for the Real- 3 papers Engineering) World 3 papers (Half-day tutorial)

break

3:30pm Sponsor Security, Web Services Semantic Developers Web History Semantic Web Search W3C Track to Exhibition Privacy, 2 of 2 (SLAs Web: Track Exhibit 3 of 5 (Query 6 of 7 Query, 5:00pm Hall Reliability, and and QoS) Technologies Next (cont’d) Languages (Knowledge Interchange, (cont’d) Ethics 4 papers and Generation and DBs) Discovery) and Access 1 of 3 Applications Web 4 papers 3 papers with XML! (Defending for the Real- Servers Against World Emerging (cont’d) Threats) 4 papers 5:00pm to 5:30pm

26 Friday, May 11, 2007: Weaving the Web Saturday, May 12, 2007: The World Wide Web and You

Room VanHorne Shaughnessy Beatty Coleman Theatre Petrak New Alberta Cascade Room Shaughnessy Beatty Coleman Theatre Petrak New Brunswick Alberta Brunswick Location CC2 CC2 CC2 CC2 CC1 HM2 HM2 HM2 HM2 Location CC2 CC2 CC2 CC1 HM2 HM2 HM2

8:30am WWW2007 Announcements and Plenary Speaker: Bill Buxton (Microsoft Research/University of Toronto) 8:30am to WWW2007 Announcements and Plenary Speaker: Dick Hardt (SXIP Identity) to Design for the World Narrow Web (Van Horne Ballroom) 10:00am An Identity Story (Van Horne Ballroom) 10:00am break break 10:30am Sponsor Web Searching Developers Industry Web History Semantic Web Data Mining W3C Track 10:30am to Semantic Web E* Applications Developers Industry Talks Web History Security, Search to noon Exhibition Engineering Personal Track Talks Exhibit 1 of 5 3 of 5 (Similarity A Multimodal noon 4 of 5 1 of 2 (E- Track Web Exhibit Privacy, 7 of 7 Hall 1 of 2 (Web Content (panel) Linked Data Web and (Applications) Search) Web to (Ontologies) Communities) Web Data 1 Enterprises Reliability, and (Personalization) (Van Horne Modeling) Patents 3 papers 3 papers Expand 3 papers 3 papers Ethics 3 papers C) 3 papers Universal 2 of 3 Access (Passwords and Phishing) lunch 3 papers break lunch break 1:30pm Sponsor Web Web Services Semantic Developers Web History Semantic Web Search W3C Track to Exhibition Engineering 1 of 2 Web: Track Exhibit 2 of 5 5 of 7 Architectural 3:00pm Hall 2 of 2 (End-User (Orchestration Technologies Emerging (cont’d) (Similarity and (Advertisements Integration 1:30pm to Semantic Web E* Applications Developers Industry Panel Web History Birds of a Data Mining (cont’d) Perspective and and and Web Extraction) and Click 3:00pm 5 of 5 2 of 2 Track Social Exhibit Feather (BOF) 4 of 5 (Predictive Measurement Choreography) Applications Platforms 3 papers Estimates) (Semantic Web (E-Commerce Web Data 2 Computing (cont’d) Session 1 of 2 Modeling of Web in Web 3 papers for the Real- 3 papers and Web 2.0) and E-Content) Topic TBD Users) Engineering) World 3 papers 3 papers 3 papers 3 papers (Half-day break tutorial) 3:30pm to Security, Lightning Talks Developers Industry Panel Web History Birds of a Data Mining 5:00pm Privacy, Work in Track Web-based Exhibit Feather (BOF) 5 of 5 (Mining in break Reliability, and Progress Social Businesses (cont’d) Session 2 of 2 Social Networks) 3:30pm Sponsor Security, Web Services Semantic Developers Web History Semantic Web Search W3C Track Ethics Session (sign Networks and Topic TBD 3 papers to Exhibition Privacy, 2 of 2 (SLAs Web: Track Exhibit 3 of 5 (Query 6 of 7 Query, 3 of 3 (Access up during Lightning Talks 5:00pm Hall Reliability, and and QoS) Technologies Next (cont’d) Languages (Knowledge Interchange, Control and conference) (cont’d) Ethics 4 papers and Generation and DBs) Discovery) and Access Trust on the 1 of 3 Applications Web 4 papers 3 papers with XML! Web) 3 papers (Defending for the Real- Servers Evening WWW2007 Closing Ceremony Against World 5:00pm to 5:30pm Emerging (cont’d) Threats) 4 papers 5:00pm to 5:30pm

27 www2007.org

Towards Domain-Independent Information Extraction from Refereed Papers Web Tables (organized by Track and Session) Wolfgang Gatterbauer, Vienna University of Technology Paul Bohunsky, Vienna University of Technology Track: Browsers and User Interfaces Marcus Herzog, Vienna University of Technology SESSION: Personalization Bernhard Kroepl, Vienna University of Technology (Wed May 9, 1:30pm-3:00pm, New Brunswick, HM2) Bernhard Pollak, Vienna University of Technology Web Object Retrieval Homepage Live: Automatic Block Tracing for Web Zaiqing Nie, Microsoft Research Asia Personalization Yunxiao Ma, Microsoft Research Asia Jie Han, Shanghai Jiaotong University Shuming Shi, Microsoft Research Asia Dingyi Han, Shanghai Jiaotong University Ji-Rong Wen, Microsoft Research Asia Chenxi Lin, Microsoft Research Asia Wei-Ying Ma, Microsoft Research Asia Hua-Jun Zeng, Microsoft Research Asia Zheng Chen, Microsoft Research Asia SESSION: Mining Textual Data Yong Yu, Shanghai Jiaotong University (Thu May 10, 1:30pm-3:00pm, Alberta, HM2) Open User Profiles for Adaptive News Systems: Help or Harm? Jaewook Ahn, University of Pittsburgh Summarizing Email Conversations with Clue Words Peter Brusilovsky, University of Pittsburgh Giuseppe Carenini, University of British Columbia Jonathan Grady, University of Pittsburgh Raymond Ng, University of British Columbia Daqing He, University of Pittsburgh Xiaodong Zhou, University of British Columbia Sue Yeon Syn, University of Pittsburgh Organizing and Searching the World Wide Web of Facts - Investigating Behavioral Variability in Web Search Step Two: Harnessing the Wisdom of the Crowds Ryen White, Microsoft Research Marius Pasca, Google Inc. Steven M. Drucker, Microsoft LiveLabs Do Not Crawl in the DUST: Different URLs with Similar Text Ziv Bar-Yossef, Technion - Israel Institute of Technology and SESSION: Smarter Browsing Google Haifa (Wed May 9, 3:30pm-5:00pm, New Brunswick, HM2) Idit Keidar, Technion - Israel Institute of Technology Uri Schonfeld, University of California at Los Angeles CSurf: A Context-Driven Non-Visual Web-Browser SESSION: Similarity Search Jalal Mahmud,* Stony Brook University (Fri May 11, 10:30am-noon, Alberta, HM2) Yevgen Borodin, Stony Brook University I.V. Ramakrishnan, Stony Brook University A New Suffix Tree Similarity Measure for Document Clustering GeoTracker: Geospatial and Temporal RSS Navigation Hung Chim, City University of Hong Kong Yih-Farn Chen, AT&T Labs - Research Xiaotie Deng, City University of Hong Kong Giuseppe Di Fabbrizio, AT&T Labs - Research Scaling Up All-Pairs Similarity Search David Gibbon, AT&T Labs - Research Roberto Bayardo, Google Rittwik Jana, AT&T Labs Research Yiming Ma, University of California at Irvine Serban Jora, AT&T Labs - Research Ramakrishnan Srikant, Google Bernard Renger, AT&T Labs - Research Detecting Near-Duplicates for Web Crawling Bin Wei, AT&T Labs - Research Gurmeet Manku, Google Inc. Learning Information Intent via Observation Arvind Jain, Google Inc. Anthony Tomasic, Carnegie Mellon University Anish Das Sarma, Stanford University Isaac Simmons, Carnegie Mellon University John Zimmerman, Carnegie Mellon University SESSION: Predictive Modeling of Web Users (Sat May 12, 1:30pm-3:00pm, Alberta, HM2)

Track: Data Mining Demographic Prediction based on User’s Browsing Behavior SESSION: Identifying Structure in Web Pages Jian Hu, Microsoft Research Asia (Thu May 10, 10:30am-noon, Alberta, HM2) Hua-Jun Zeng, Microsoft Research Asia Hua Li, Microsoft Research Asia Page-level Template Detection via Isotonic Smoothing Cheng Niu, Microsoft Research Asia Deepayan Chakrabarti, Yahoo! Research Zheng Chen, Microsoft Research Asia Ravi Kumar, Yahoo! Research Why We Search? Visualizing and Predicting User Behavior Kunal Punera, Univ of Texas at Austin Eytan Adar, University of Washington Daniel Weld, University of Washington Brian Bershad, University of Washington Steven Gribble, University of Washington

* paper award nominee

28 Topic Sentiment Mixture: Modeling Facets and Opinions in Extraction and Search of Chemical Formulae in Text Weblogs Documents on the Web Qiaozhu Mei, University of Illinois at Urbana-Champaign Bingjun Sun, Pennsylvania* State University Xu Ling, University of Illinois at Urbana-Champaign Qingzhao Tan, Pennsylvania State University Matthew Wondra, University of Illinois at Urbana-Champaign Prasenjit Mitra, Pennsylvania State University Hang Su, Yahoo! Inc. C. Lee Giles, Pennsylvania State University ChengXiang Zhai, UIUC A Content-Driven Reputation System for the Wikipedia B. Thomas Adler, University of California, at Santa Cruz SESSION: Mining in Social Networks Luca de Alfaro, University of California, at Santa Cruz (Sat May 12, 3:30pm-5:00pm, Alberta, HM2) Track: Industrial Practice and Experience Wherefore Art Thou R3579X? Anonymized Social Networks, SESSION: IPE Hidden Patterns, and Structural Steganography (Thu May 10, 1:30pm-3:00pm, New Brunswick, HM2) Lars Backstrom, Cornell University * Cynthia Dwork, Microsoft Research Google News Personalization: Scalable Online Jon Kleinberg, Cornell University Collaborative Filtering Information Flow Modeling based on Diffusion Rate for Abhinandan Das, Google* Inc. Prediction and Ranking Mayur Datar, Google Inc. Xiaodan Song, NEC Laboratories America Ashutosh Garg, Google Inc Yun Chi, NEC Laboratories America Shyam Rajaram, University of Illinois at Urbana Champaign Koji Hino, NEC Laboratories America Exploring in the Weblog Space by Detecting Informative and Belle Tseng, NEC Laboratories America Affective Articles NetProbe: A Fast and Scalable System for Fraud Detection in Xiaochuan Ni, Shanghai Jiao-Tong University Online Auction Networks Gui-Rong Xue, Shanghai Jiao-Tong University Shashank Pandit, Carnegie Mellon University Xiao Ling, Shanghai Jiao-Tong University Duen Horng Chau, Carnegie Mellon University Yong Yu, Shanghai Jiao-Tong University Samuel Wang, Carnegie Mellon University Qiang Yang, Hong Kong University of Science and Technology Christos Faloutsos, Carnegie Mellon University Spam Double-Funnel: Connecting Web Spammers with Advertisers Track: E* Applications Yi-Min Wang, Microsoft Research SESSION: E-Communities Ming Ma, Microsoft Research (Sat May 12, 10:30am-noon, Beatty, CC2) Yuan Niu, University of California, Davis Hao Chen, University of California, Davis The Complex Dynamics of Collaborative Tagging Harry Halpin, University of Edinburgh Track: Performance and Scalability Valentin Robu, National Center for Mathematics and Computer SESSION: Scalable Systems for Dynamic Content Science, Amsterdam (Thu May 10, 10:30am-noon, Shaughnessy, CC2) Hana Shepherd, Princeton University Expertise Networks in Online Communities: Structure and GlobeTP: Template-Based Replication for Scalable Algorithms Web Applications Jun Zhang, University of Michigan Tobias Groothuyse, Vrije Universiteit, Amsterdam Mark Ackerman, University of Michigan Swaminathan Sivasubramanian, Vrije Universiteit, Amsterdam Lada Adamic, University of Michigan Guillaume Pierre, Vrije Universiteit, Amsterdam Internet-Scale Collection of Human-Reviewed Data Consistency-preserving Caching of Dynamic Database Content Qi Su, Yahoo! Inc Niraj Tolia, Carnegie Mellon University Dmitry Pavlov, Yahoo! Inc M. Satyanarayanan, Carnegie Mellon University Jyh-Herng Chow, Yahoo! Inc Optimized Query Planning of Continuous Aggregation Queries Wendell Baker, Yahoo! Inc in Dynamic Data Dissemination Networks Rajeev Gupta, IBM India Research Lab SESSION: E-Commerce and E-Content Krithi Ramamritham, IIT Bombay (Sat May 12, 1:30pm-3:00pm, Beatty, CC2) SESSION: Performance Engineering of Web Applications DETECTIVES: DETEcting Coalition hiT Inflation attacks in (Thu May 10, 3:30pm-5:00pm, Shaughnessy, CC2) adVertising nEtworks Streams Ahmed Metwally, University of California, at Santa Barbara A Scalable Application Placement Controller for Enterprise Divyakant Agrawal, University of California, at Santa Barbara Data Centers Amr El Abbadi, University of California, at Santa Barbara Chunqiang Tang, IBM T.J. Watson Research Center Malgorzata Steinder, IBM Research Michael Spreitzer, IBM Research Giovanni Pacifici, IBM Research * paper award nominees

29 www2007.org

A Unified Platform for Data Driven Web Applications with Combining Classifiers to Identify Online Databases Automatic Client-Server Partitioning Luciano Barbosa, University of Utah Fan Yang, Cornell University Juliana Freire, University of Utah Nitin Gupta, Cornell University An Adaptive Crawler for Locating Hidden-Web Entry Points Nicholas Gerner, Cornell University Luciano Barbosa, University of Utah Xin Qi, Cornell University Juliana Freire, University of Utah Alan Demers, Cornell University Johannes Gehrke, Cornell University SESSION: Web Graphs Jayavel Shanmugasundaram, Yahoo! (Wed May 9, 3:30pm-5:00pm, Alberta, HM2) MyXDNS: A Request Routing DNS Server With Decoupled Server Selection Random Web Crawls Hussein Alzoubi, Case Western Reserve University Toufik Bennouas, Criteo R&D Michael Rabinovich, Case Western Reserve University Fabien de Montgolfier, Universite Paris 7 Oliver Spatscheck, AT&T Research Labs Extraction and Classification of Dense Communities in the Web Yon Dourisboure, Institute for Informatics and Telematics of C.N.R. Track: Pervasive Web and Mobility Filippo Geraci, Institute for Informatics and Telematics of C.N.R. SESSION: Pervasive Web and Mobility Marco Pellegrini, Institute for Informatics and Telematics of (Thu May 10, 10:30am-noon, Beatty, CC2) C.N.R. Web Projections: Learning from Contextual Subgraphs Robust Web Page Segmentation for Mobile Terminal Using of the Web Content-Distances and Page Layout Information Jure Leskovec, Carnegie Mellon University Gen Hattori, KDDI R&D Laboratories Susan Dumais, Microsoft Research Keiichiro Hoashi, KDDI R&D Laboratories Eric Horvitz, Microsoft Research Kazunori Matsumoto, KDDI R&D Laboratories Fumiaki Sugaya, KDDI R&D Laboratories SESSION: Search Quality and Precision PRIVE: Anonymous Location-Based Queries in Distributed (Thu May 10, 3:30pm-5:00pm, Alberta, HM2) Mobile Systems Gabriel Ghinita, National University of Singapore Supervised Rank Aggregation Panos Kalnis, National University of Singapore Yuting Liu, Microsoft Research Asia and Spiros Skiadopoulos, University of Peloponnese Beijing Jiatong University A Mobile Application Framework for the Geospatial Web Tie-Yan Liu, Microsoft Research Asia Rainer Simon, Telecommunications Research Center Vienna Tao Qin, Microsoft Research Asia and Tsinghua University Peter Froehlich, Telecommunications Research Center Vienna Zhiming Ma, Chinese Academy of Science Hang Li, Microsoft Research Asia Track: Search Navigating the Intranet with High Precision SESSION: Search Potpourri Huaiyu Zhu, IBM Research (Wed May 9, 10:30am-noon, Alberta, HM2) Alexander Loeser, SAP Research Sriram Raghavan, IBM Research Almaden Navigation-Aided Retrieval Shivakumar Vaithyanathan, IBM Research Shashank Pandit, Carnegie Mellon University Optimizing Web Search Using Social Annotations Christopher Olston, Yahoo! Research Shenghua Bao, Shanghai Jiao Tong University Efficient Search Engine Measurements Xiaoyuan Wu, Shanghai Jiao Tong University Ziv Bar-Yossef, Technion - Israel Institute of Technology and Ben Fei, IBM China Research Lab Google Haifa Gui-Rong Xue, Shanghai Jiao Tong University Maxim Gurevich, Technion - Israel Institute of Technology Zhong Su, IBM China Research Lab Efficient Search in Large Textual Collections with Redundancy Yong Yu, Shanghai Jiao Tong University Jiangong Zhang, Polytechnic University * Torsten Suel, Polytechnic University SESSION: Advertisements and Click Estimates (Fri May 11, 1:30pm-3:00pm, Alberta, HM2) SESSION: Crawlers (Wed May 9, 1:30pm-3:00pm, Alberta, HM2) Robust Methodologies for Modeling Web Click Distributions Kamal Ali, Yahoo! The Discoverability of the Web Mark Scarr, Yahoo! Anirban Dasgupta, Yahoo! Research Predicting Clicks: Estimating the Click-Through Rate for Arpita Ghosh, Yahoo! Research New Ads Ravi Kumar, Yahoo! Research Matthew Richardson, Microsoft Research Christopher Olston, Yahoo! Research Ewa Dominowska, Microsoft Sandeep Pandey, Yahoo! Research Robert Ragno, Microsoft Research Andrew Tomkins, Yahoo! Research

* paper award nominee 30 Dynamics of Bid Optimization in Online Advertisement Auctions SESSION: Passwords and Phishing Christian Borgs, Microsoft Research (Saturday May 12, 10:30am-noon, New Brunswick, HM2) Jennifer Chayes, Microsoft Research Omid Etesami, U.C. Berkeley CANTINA: A Content-Based Approach to Detecting Phishing Nicole Immorlica, Microsoft Research Web Sites Kamal Jain, Microsoft Research Yue Zhang, University of Pittsburgh Mohammad Mahdian, Yahoo! Research Jason Hong, Carnegie Mellon University Lorrie Cranor, Carnegie Mellon University SESSION: Knowledge Discovery Learning to Detect Phishing Emails (Fri May 11, 3:30pm-5:00pm, Alberta, HM2) Ian Fette, Carnegie Mellon University Norman Sadeh, Carnegie Mellon University Compare&Contrast: Using the Web to Discover Comparable Anthony Tomasic, Carnegie Mellon University Cases for News Stories A Large-Scale Study of Web Password Habits Jiahui Liu, Northwestern University Dinei Florencio, Microsoft Research Earl Wagner, Northwestern University Cormac Herley, Microsoft Research Larry Birnbaum, Northwestern University Answering Bounded Continuous Search Queries in the World SESSION: Access Control and Trust on the Web Wide Web (Saturday May 12, 3:30pm-5:00pm, Shaughnessy, CC2) Dirk Kukulenz, Institute of Information Systems Alexandros Ntoulas, Microsoft Search Labs A Fault Model and Mutation Testing of Access Control Policies Answering Relationship Queries on the Web Evan Martin, North Carolina State University Gang Luo, IBM T.J. Watson Research Center Tao Xie, North Carolina State University Chunqiang Tang, IBM T.J. Watson Research Center Analyzing Web Access Control Policies Ying-li Tian, IBM T.J. Watson Research Center Vladimir Kolovski, University of Maryland James Hendler, University of Maryland SESSION: Personalization Bijan Parsia, University of Manchester (Sat May 12, 10:30am-noon, Alberta, HM2) Compiling Cryptographic Protocols for Deployment on the Web Jay McCarthy, Brown University Dynamic Personalized Pagerank in Entity-Relation Graphs Joshua D. Guttman, MITRE Corporation Soumen Chakrabarti, IIT Bombay John D. Ramsdell, MITRE Corporation A Large-scale Evaluation and Analysis of Shriram Krishnamurthi, Brown University Strategies Zhicheng Dou, Nankai University Track: Semantic Web Ruihua Song, Shanghai Jiao Tong University SESSION: Applications Ji-Rong Wen, Microsoft Research Asia (Fri May 11, 10:30am-noon, New Brunswick, HM2) Privacy-Enhancing Personalized Web Search Yabo Xu, Simon Fraser University Toward Expressive Syndication on the Web Benyu Zhang, Microsoft Research Asia Christian Halaschek-Wiener, The University* of Maryland Zheng Chen, Microsoft Research Asia James Hendler, University of Maryland Ke Wang, Simon Fraser University Exhibit: Light-weight Structured Data Publishing David Huynh, MIT Track: Security, Privacy, Reliability, and Ethics David Karger, MIT SESSION: Defending Against Emerging Threats Rob Miller, MIT (Fri May 11, 3:30pm-5:30pm, Shaughnessy, CC2) SPARQ2L: Towards Support For Subgraph Extraction Queries in RDF Databases Defeating Script Injection Attacks with Browser-Enforced Kemafor Anyanwu, University of Georgia Embedded Policies Angela Maduko, University of Georgia Trevor Jim, AT&T Labs Research Amit Sheth, Wright State University Nikhil Swamy, University of Maryland Michael Hicks, University of Maryland SESSION: Similarity and Extraction Subspace: Secure Cross-Domain Communication for Web (Fri May 11, 1:30pm-3:00pm, New Brunswick, HM2) Mashups Collin Jackson, Stanford University Measuring Semantic Similarity between Words Using Web Helen Wang, Microsoft Research Search Engines Exposing Private Information by Timing Web Applications Danushka Bollegala, University of Tokyo Andrew Bortz, Stanford University Yutaka Matsuo, AIST Dan Boneh, Stanford University Mitsuru Ishizuka, University of Tokyo On Anonymizing Query Logs via Token-based Hashing Ravi Kumar, Yahoo! Research Jasmine Novak, Yahoo! Research Bo Pang, Yahoo! Research Andrew Tomkins, Yahoo! Research * paper award nominee 31 www2007.org

Using Google Distance to Weight Approximate Ontology Analysis of Topological Characteristics of Huge Online Social Matches Networking Services Risto Gligorov, Philips Research Yong-Yeol Ahn, KAIST Zharko Aleksovski, Vrije Universiteit Amsterdam & Philips Seungyeop Han, KAIST Research Haewoon Kwak, KAIST Warner ten Kate, Philips Research Sue Moon, KAIST Frank van Harmelen, Vrije Universiteit Amsterdam Hawoong Jeong, KAIST Hierarchical, Perceptron-like Learning for Ontology-Based P-TAG: Large Scale Automatic Generation of Personalized Information Extraction Annotation TAGs for the Web Yaoyong Li, University of Sheffield Paul - Alexandru Chirita, L3S / University of Hannover Kalina Bontcheva, University of Sheffield Stefania Costache, L3S / University of Hannover Siegfried Handschuh, Digital Enterprise Research Institute SESSION: Query Languages and DBs Wolfgang Nejdl, L3S / University of Hannover (Fri May 11, 3:30pm-5:30pm, New Brunswick, HM2) Track: Technology for Developing Regions From SPARQL to Rules (and back) SESSION: Communication in Developing Regions Axel Polleres, National University of Ireland (Wed May 9, 10:30am-noon, Beatty, CC2) Bridging the Gap Between OWL and Relational Databases Boris Motik, University of Manchester Connecting the Bottom of the Pyramid: An Exploratory Case Ian Horrocks, University of Manchester Study of India’s Rural Communication Environment Ulrike Sattler, University of Manchester Sarita Seshagiri, Motorola India Research Labs ActiveRDF: Object-Oriented Semantic Web Programming Aman Sagar, Motorola India Research Labs Eyal Oren, National University of Ireland Dhaval Joshi, Motorola India Research Labs Renaud Delbru, National University of Ireland Communication as Information-Seeking: The Case for Mobile Armin Haller, National University of Ireland Social Software for Developing Regions Sebastian Gerke, National University of Ireland Beth Kolko, University of Washington Explorations in the Use of Semantic Web Technologies for Emma Rose, University of Washington Product Information Management Erica Johnson, University of Washington Jean-Sebastien Brunner, IBM China Research Laboratory Optimal Audio-Visual Representations for Illiterate Users of Li Ma, IBM China Research Laboratory Computers Chen Wang, IBM China Research Laboratory Indrani Medhi, Microsoft Research India Lei Zhang, IBM China Research Laboratory Archana Prasad, Microsoft Research India Daniel C. Wolfson, IBM Software Group Kentaro Toyama, Microsoft Research India Yue Pan, IBM China Research Laboratory Kavitha Srivinas, IBM T.J. Watson Research Center SESSION: Networking Issues in the Web (Wed May 9, 3:30pm-5:00pm, Beatty, CC2) SESSION: Ontologies (Sat May 12, 10:30am-noon, Shaughnessy, CC2) Identifying and Discriminating Between Web and Peer-to-Peer Traffic in the Network Core Yago: A Core of Semantic Knowledge - Unifying WordNet and Jeffrey Erman, University of Calgary Wikipedia Anirban Mahanti, University of Calgary Fabian M. Suchanek, Max-Planck-Institute Martin Arlitt, HP Labs/University of Calgary Gjergji Kasneci, Max-Planck-Institute Carey Williamson, University of Calgary Gerhard Weikum, Max-Planck-Institute Long Distance Wireless Mesh Network Planning: Problem Ontology Summarization Based on RDF Sentence Graph Formulation and Solution Xiang Zhang, Southeast University Sayandeep Sen, IIT Kanpur Gong Cheng, Southeast University Bhaskaran Raman, IIT Kanpur Yuzhong Qu, Southeast University Is High-Quality VoD Feasible using P2P Swarming? Just the Right Amount: Extracting Modules from Ontologies Siddhartha Annapureddy, New York University Bernardo Cuenca Grau, University of Manchester Saikat Guha, Cornell University Ian Horrocks, University of Manchester Dinan Gunawardena, Microsoft Research Yevgeny Kazakov, University of Manchester Christos Gkantsidis, Microsoft Reseacrh Ulrike Sattler, University of Manchester Pablo Rodriguez, Telefonica Research

SESSION: Semantic Web and Web 2.0 Track: Web Engineering (Sat May 12, 1:30pm-3:00pm, Shaughnessy, CC2) SESSION: Web Modeling The Two Cultures: Mashing Up Web 2.0 and the Semantic Web (Fri May 11, 10:30am-noon, Shaughnessy, CC2) (position paper) Turning Portlets into Services: The Consumer Profile Anupriya Ankolekar, Universitat Karlsruhe Oscar Diaz, University of the Basque Country Markus Kroetzsch, Universitat Karlsruhe Salvador Trujillo, University of the Basque Country Thanh Tran, Universitat Karlsruhe Sandy Perez, University of the Basque Country Denny Vrandecic, Universitat Karlsruhe

32 A Framework for Rapid Integration of Presentation SESSION: SLAs and QoS Components (Fri May 11, 3:30pm-5:30pm, Beatty, CC2) Jin Yu, University of New South Wales Boualem Benatallah, University of New South Wales Reliable QoS Monitoring Based on Client Feedback Regis Saint-Paul, University of New South Wales Radu Jurca, Ecole Polytechnique Federale de Lausanne EPFL Fabio Casati, University of Trento Walter Binder, University of Lugano Florian Daniel, Politecnico di Milano Boi Faltings, Ecole Polytechnique Federale de Lausanne EPFL Maristella Matera, Politecnico di Milano Preference-based Selection of Highly Configurable Web Integrating Value-based Requirement Engineering Models to Services WebML using VIP Business Modeling Framework Steffen Lamparter, Universitaet Karlsruhe Farooque Azam, Beijing University of Aeronautics and Anupriya Ankolekar, Universitaet Karlsruhe Astronautics Stephan Grimm, FZI Karlsruhe Zhang Li, Beijing University of Aeronautics and Astronautics Rudi Studer, Universitaet Karlsruhe Rashid Ahmad, Beijing University of Aeronautics and Speeding up Adaptation of Web Service Compositions Using Astronautics Expiration Times John Harney, University of Georgia SESSION: End-Users Perspective and Measurement Prashant Doshi, University of Georgia (Fri May 11, 1:30pm-3:00pm, Shaughnessy, CC2) DIANE - An Integrated Approach to Automated Service Discovery, Matchmaking and Composition Towards Effective Browsing of Large Scale Social Ulrich Kuester, Friedrich Schiller University Jena Annotations Birgitta Koenig-Ries, Friedrich-Schillder-University Jena Rui Li, Shanghai* JiaoTong University Mirco Stern, Universitaet Karlsruhe Shenghua Bao, Shanghai Jiao Tong University Michael Klein, Universitaet Karlsruhe Ben Fei, IBM China Research Lab Zhong Su, IBM China Research Lab Track: XML and Web Data Yong Yu, Shanghai Jiao Tong University SESSION: Querying and Transforming XML Supporting End-Users in the Creation of Dependable (Wed May 9, 10:30am-noon, New Brunswick, HM2) Web Clips Sandeep Lingam, University of Nebraska Multiway SLCA-based Keyword Search in XML Data Sebastian Elbaum, University on Nebraska Chong Sun, National University of Singapore Effort Estimation: How Valuable is it for a Web company to Chee-Yong Chan, National University of Singapore Use a Cross-company Data Set, Compared to Using Its Own Amit Goenka, National University of Singapore Single-company Data Set? Visibly Pushdown Automata for Streaming XML Emilia Mendes, University of Auckland Viraj Kumar, UIUC Sergio Di Martino, University of Salerno Parthasarathy Madhusudan, UIUC Filomena Ferrucci, University of Salerno Mahesh Viswanathan, UIUC Carmine Gravino, University of Salerno Mapping-Driven XML Transformation Haifeng Jiang, IBM Almaden Research Center Track: Web Services Howard Ho, IBM Almaden Research Center SESSION: Orchestration & Choreography Lucian Popa, IBM Almaden Research Center (Fri May 11, 1:30pm-3:00pm, Beatty, CC2) Wook-Shin Han, National University

Towards the Theoretical Foundation of Choreography SESSION: Parsing, Normalizing, and Storing XML Zongyan Qiu, (Thu May 10, 10:30am-noon, New Brunswick, HM2) Xiangpeng Zhao, Peking University Chao Cai, Peking University Querying and Maintaining a Compact XML Storage Hongli Yang, Peking University Raymond Wong, National ICT Australia Introduction and Evaluation of Martlet, a Scientific Workflow XML Design for Relational Storage Language for Abstracted Parallelisation Solmaz Kolahi, University of Toronto Daniel James Goodman, Oxford University* Leonid Libkin, Universtiy of Edinburgh Semi-Automated Adaptation of Service Interactions A High-Performance Interpretive Approach to Schema-Directed Hamid R. Motahari Nezhad, University of New South Wales Parsing Boualem Benatallah, University of New South Wales Morris Matsa, IBM Corporation Axel Marten, IBM TJ Watson Research Centre Eric Perkins, IBM Corporation Francisco Curbera, IBM TJ Watson Research Centre Abraham Heifets, IBM Corporation Fabio Casati, University of Trento Margaret Gaitatzes Kostoulas, IBM Corporation Daniel Silva, IBM Corporation Noah Mendelsohn, IBM Corporation Michelle Leger, IBM Corporation

* paper award nominees

33 www2007.org

Harnessing the Semantic Web to Answer Scientific Questions; W3C Track A HCLS IG Demo Cascade Ballroom (HM2) Susie Stephens, Eli Lilly and Company Alan Ruttenberg, Science Commons

Wednesday, May 9, 2007 Security and Usability on the Web, 1:30pm-3:00pm Making Mobile Browsing Better, 10:30am-noon Session Chair: Thomas Roessler, W3C Session Chair: Michael Smith, W3C Moving User-Centered Security from Grand Challenge to Mobile Web Initiative Success Stories Standards Work Michael Smith, W3C Mary Ellen Zurko, IBM Towards a mobileOK Web Usability Design and Testing for Security Dan Appelquist, Vodafone Rachna Dhamija, CommerceNet Describing, Exchanging, and Aggregating Test Results Design by Crowds: User Experience Design and Testing with Shadi Abou-Zahra, W3C Open Source Projects Device Description: Important New Work in Progress, Why We Mike Beltzner, Mozilla Need your Participation Rhys Lewis, Volantis Web of Services for Enterprise Computing, 3:30pm-5:00pm Mobile Web to Bridge the Digital Divide Session Chair: Philippe Le Hegaret, W3C Charles McCathie Nevile, Opera Software Report from the Web of Services for Enterprise Computing Mobile Web Initiative: The Road Ahead Workshop Panel (with speakers and James Pearce, mTLD, Art Barstow, Philippe Le Hegaret, W3C Nokia) Why Should We Care About the Web Services Description Language 2.0? Rich Web Applications,1:30pm-3:00pm Philippe Le Hegaret, W3C Session Chair: Chris Lilley, W3C Web Services Policy Language Mobile Web Applications Charlton Barreto, Adobe Kevin Kelly, IBM Semantic Annotations for WSDL Widgets and Web Applications Jacek Kopecksy, DERI Innsbruck Art Barstow, Nokia WICD and Ubiquitous Web Applications Dave Raggett, W3C Fellow, Volantis Systems Friday, May 11, 2007 Accessible Rich Internet Applications (WAI-ARIA) A Multimodal Web to Expand Universal Access, 10:30am-noon Michael Cooper, W3C Session Chair: Kazuyuki Ashimura, W3C How to Author Multimodal Web Applications The Future of the Web Page, 3:30pm-5:00pm Kazuyuki Ashimura, W3C Session Chair: Olivier Thereaux, W3C State Chart XML: the Core Component for Multimodal Web HTML Reloaded Applications Chris Lilley, W3C Rafah Hosn, IBM Next Steps for HTML Forms Voice on the Web: Input/Output Modality Challenges Dave Raggett, W3C Fellow, Volantis Systems Jerry Carter, Nuance Communications CSS, 10 Years After Bert Bos, W3C Architectural Integration, 1:30pm-3:00pm Content Accessibility with WCAG 2.0 Session Chair: Steven Pemberton, W3C Michael Cooper, W3C The W3C Rich Web Application Backplane Enriching the Web Application Model? John Boyer, IBM Arun Ranganathan, AOL XML Application Components and Controllers Panel (with speakers and Steph Troeth, WASP/Cloudraker) Rafah Hosn, IBM xH: A Standards-based Web Application Programming Language Thursday, May 10, 2007 Mark Birbeck, x-port.net Advances in Semantic Web, 10:30am-noon Session Chair: Ivan Herman, W3C Query, Interchange and Access with XML!, 3:30pm-5:00pm Rule Interchange Format Work Report Session Chair: Liam Quin, W3C Sandro Hawke, W3C Schema Support inXQuery to Help Developers Bootstrapping the Semantic Web with GRDDL, Microformats, Mary Holstege, MarkLogic and RDFa XSL-FO, the XSL Formatting Language Harry Halpin, U. of Edinburgh Sharon Adler, IBM Fabien Gandon, INRIA Liam Quin, W3C Efficient XML Interchange Mike Cokus, MITRE

34 DevTrack Saturday, May 12, 2007 Web Data 1 Thursday, May 10, 2007 Coleman, 10:30am-noon (CC2) The Micro-Web: putting the ‘Web’ back into ‘Web 2.0’! Programming the Web Duncan Cragg, ThoughtWorks Coleman, 1:30pm-3:00pm (CC2) Parsing Microformats any way you want On Demand and Web-as-platform Programming Languages Ryan King, Technorati Peter Coffee, salesforce.com Mashing-up the Mobile Paul Downey, BT Web Data 2 Coleman, 1:30pm-3:00pm (CC2) Web Tools Designing XForms Coleman, 3:30pm-5:00pm (CC2) John Boyer, IBM Describing Web Applications - WADLing with Java Integrating Spreadsheets and the Web with Queso, Salsa, and Marc Hadley, Sun Microsystems the Boca RDF server W3C’s Unicorn: all-in-one Web Quality Checking Lee Feigenbaum, IBM Oliver Thereaux, W3C Moving Stuff - Linking Desktops with semiBlog, the Semantic The httperf Web Workload Generator Clipboard and RDFa Theodore Bullock, University of Calgary Knud Muller, DERI/NUIG

Social Networks & Lightning Talks Coleman, 3:30pm-5:00pm (CC2) Friday, May 11, 2007 Building Social Networks for the Next Generation Greg Cypes, AOL Linked Data Web Services Authentication for Mashups Coleman, 10:30am-noon (CC2) Dan Theurer, Yahoo! A Semantic Web Browser Refactoring the Ht://Dig Search Engine Tabulator: Tim Berners-Lee, W3C Neal Richter, RightNow Technologies Querying Wikipedia Like a Database Sequencing Web Services with SPARQL Annotations Christian Bizer Freie, University Berlin Eric Prud’hommeaux, W3C How to Combine the Best of Web2.0 and a Semantic Web: Examples from Revyu.com Tom Heath, KMi, The Open University

Emerging Web Platforms Acknowledgement Theatre, 1:30pm-3:00pm (CC1) The Developers Track is sponsored by: Google Data API (GData) Protocol Ryan Boyd, Google Pipes: A Tool for Remixing the Web Pasha Sadri, Yahoo!

Next-Generation Web Servers In addition to being a Platinum Sponsor, AOL agreed to sponsor Theatre, 3:30pm-5:00pm (CC1) DevTrack. Part of their funding is committed to travel support for Semantic Web Server independent developers who would otherwise be unable to attend Fabien Gandon, INRIA WWW2007. Thanks to AOL for this support, and to Danny Ayers and Atom Publishing with Apache Abdera Mark Nottingham for coordinating its allocation. Elias Torres, IBM Semantic MediaWiki Denny Vrandecic, University of Karlsruhe

35 www2007.org

Industry Speakers Friday, May 11, 2007 Talk: Web and Patents The following slate of high-profile industry speakers was made 10:30am-11:15am possible in part via the WWW2007 sponsorship program. Patent Reform: How you can fight back! Jeffrey Berkowitz, Finnegan Henderson Sessions take place in the Theatre (CC1). Saturday, May 12, 2007 Talks: Web Enterprises Wednesday, May 9, 2007 10:30am-noon Talks: Search and Data The Web as a Platform 1:30pm-3:00pm Mike Jones, Userplane/AOL Hybrid Search: Combining Structured and Unstructured Data 7 Divides: How the Web Changed and is Changing Enterprise into a Search Engine Software Tomasz Imielinski, Ask.com Vishal Sikka, SAP Humane Data Mining Rakesh Agrawal, Microsoft Research Panel: Social Computing 1:30pm-3:00pm Thursday, May 10, 2007 Social Computing: Search, Community, and Commerce Talk: Web Search Moderator: 10:30am-11:15am Mike Beltzner, Mozilla Foundation The Changing Face of Web Search Panelists: Bradley Horowitz, Yahoo! Inc. Dick Hardt, Sxip Identity Carol Jones, IBM Neel Sundaresan, eBay Research Labs Panel: Mobile Web and Ajax TBD, Google 1:30pm-3:00pm Reinventing the Mobile Browsing Experience Through Ajax Panel: Web-based Businesses Moderator: 3:30pm-5:00pm Daniel Appelquist, Vodafone New Web-based Business Models: Panelists: Money or Meaning? Mark Birbeck, x-port.net Moderator: Martin Frid-Nielsen, SoonR Ivan Sierralta, Calgary Technologies Inc. Rhys Lewis, Volantis Panelists: Arun Ranganathan, AOL Patrick Lor, iStockPhoto Michael Sikorsky, Cambrian House TBD

36 Web History Events Wednesday, May 9, 2007 Web History Breakfast with Sir Tim Berners-Lee Alhambra Dining Room, 7:30am-8:30am and Exhibit 100 guests, by invitation only. Sponsored by the Web History Center and Calgary Technologies Inc. WWW2007 is delighted to host the second-ever Web History Events, Track, and Exhibit, and the first since 1997. These are co-sponsored WWW2007 Opening Ceremonies and Plenary Session and organized by the Web History Center (http://webhistory.org) and Van Horne Ballroom, 8:30am-10:00am WWW2007. The Two Magics of Web Science Sir Tim Berners-Lee, MIT/W3C A Web History Exhibit is on display in the Ivor Petrak Room (HM2) from Wednesday to Saturday (10:00am to 5:00pm each day). The Web History Track Web History events at WWW2007 are below; please see http:// Shaughnessy (CC2), 10:30am-noon www2007.org/webhistory.php for full details. Dress Rehearsal: Mass-Market E-Commerce in the 1980s Hermann Maurer, University of Graz Tuesday, May 8, 2007 The Difficult Birth of Commerce on the Web in the early 1990s Web History Opening Reception Marty Tenenbaum, CommerceNet Riverview Lounge, 5:00pm-6:00pm (HM2) Allan Schiffman, CommerceNet Open to all Tuesday WWW2007 attendees, and those who purchase tickets separately. 1:30pm-3:00pm Sponsored by the Web History Center and WWW2007. Tutorial: Saving our Collective Memory John Toole, Computer History Museum Web History Opening Session Bill Pickett, Web History Center Location TBD, 6:00pm-8:00pm Marc Weber, Web History Center Introductory Remarks The Late 90s Commerce Explosion; Search’s Quest to Bebo White, SLAC, IW3C2, and Web History Center Become an Industry Marc Weber, Web History Center Gary Chevsky, Symantec Bill Pickett, Web History Center Saving our Collective Memory 3:30pm-5:00pm John Toole, Computer History Museum Web Commerce Grows Up The Birth of E-Commerce Zaheda Bhorat, Google Marty Tenenbaum, CommerceNet Rohit Khare, 4K Associates Allan Schiffman, CommerceNet The 14-year History of the IW3C2 and the WWW Conference Origins of the International Web Conference Series Series Wendy Hall, University of Southampton, and WSRI Wendy Hall, University of Southampton, and WSRI Bebo White, SLAC, IW3C2, and Web History Center

37 www2007.org

Abstract Panels Performance, scalability, and availability continue to be critically important for the Web. As the Web has evolved, some issues, such as Wednesday, May 9, 2007 how to serve static data efficiently as well as many issues in caching, have been solved to a great extent. However other issues, such as how to serve dynamic data efficiently when complicated back-end Web Delivery in Developing Regions processing is involved, continue to be of considerable importance. Beatty, 1:30pm-3:00pm (CC2) Companies with major presences on the Web devote a considerable Moderator: amount of hardware to serving dynamic data. The savings which can Amit A. Nanavati, IBM Research, India be achieved by providing more efficient solutions are significant. Panelists: Saman Amarasinghe, MIT, USA The Role of Multimedia Metadata Standards in a Ken Banks, kiwanja.net, UK (Semantic) Web 3.0 Krithi Ramamritham, IIT Bombay, India New Brunswick, 3:30pm-5:00pm (HM2) Umar Saif, MIT, USA and LUMS, Pakistan Moderators: Kentaro Toyama, Microsoft Research, India Raphael Troncy, CWI Amsterdam, The Netherlands Abstract Susanne Boll, University of Oldenburg, Germany This panel aims to find the right delivery model for the Internet Panelists: services that can be applicable to people in developing regions. Sean Bechhofer, University of Manchester (UK) The panel will bring academicians and researchers from the industry Lynda Hardman, CWI Amsterdam / Technical University of working on projects in developing countries to brainstorm on the Eindhoven (The Netherlands) different requirements and the usability aspects of the population Mor Naaman, Yahoo! Research Berkeley (USA) that has several economic, social and IT challenges. Based on John Smith, IBM (USA) such requirements, the panel will bring fresh viewpoints for the Abstract most effective means of delivering services over the web to such a Are multimedia metadata really needed on the Semantic Web? Are population. “real” multimedia standards, such as MPEG-7, of any value at all to the Web community? Do we really need to invoke the complexity of formal knowledge representation languages and ontologies? Thursday, May 10, 2007 The Web already supports the storage and retrieval of media such as text, image, video and audio. In contrast to text, other media types Building a Semantic Web in Which Our Data Can Participate require some sort of metadata in order to make them indexable and Coleman, 10:30am-noon (CC2) searchable. Surrounding text on the web page and user assigned Moderator: tags are current methods which give access to millions of images Paul Miller, Talis and videos to millions of users. The Web 2.0 paradigm has become Panelists: successful partly because it asks almost nothing from its end users. Matt Biddulph, freelance So, is there even a problem to be solved? Steve Coast, OpenStreetMap Ian Davis, Talis Web Search Privacy Issues Peter Murray-Rust, University of Cambridge Theatre, 3:30pm-5:00pm (CC1) Abstract Moderator: This panel session will introduce participants to the increasingly Greg Conti, United States Military Academy, USA important concept of open data, illustrating a broader set of concerns Panelists: with real-world examples from broadcasting, scholarly publishing, Judit Bar-Ilan, Bar-Ilan University map making and the library sector. Panelists will use these examples Tom Cross, IBM Internet Security Systems to highlight current restrictions on the effective use and reuse of rich Bernard J. Jansen, Pennsylvania State University data in powering the Semantic Web, and will offer suggestions as to Martin Kratz, Bennett Jones LLP ways in which attitudes and practice can and must change if we are Wendy Seltzer, Brooklyn Law School to realise the potential of the data already held in databases around Abstract the world. Best practices for user privacy and data retention are a controversial issue in the WWW community. As highlighted by the accidental Performance and Scalability disclosure of search terms by AOL last summer, web users have Shaughnessy, 1:30pm-3:00pm (CC2) shown a marked propensity to disclose personal information while Moderator: using the powerful free tools provided by web companies. Some Arun Iyengar, IBM Research, USA believe retention of data (for example search queries) is an essential Panelists: business requirement and critical to admirable goals such as perfect Michele Colajanni, University of Modena, Italy search. After all, the services are free and the user could always Paul Dantzig, IBM, USA choose not to use them. Others believe that data collection and Swee Lim, Yahoo!, USA retention are threats to privacy and, despite even the best intentions of Misha Rabinovich, Case Western Reserve University, USA web companies, the power these stockpiles provide will eventually be Prashant Shenoy, University of Massachusetts at Amherst, abused. The other major players in the equation are law enforcement USA and governmental agencies who have supported positions both for and against data retention. The purpose of the panel is to address these issues head on and jointly seek solutions that will allow web 38 companies to flourish, while at the same time protecting the privacy Abstract rights of individuals and organizations. This panel consists of experts It has often been argued that it is much easier to find information on from diverse positions on these topics, includes representatives from the Web rather than on one’s own desktop, email accounts, or even industry, academia and government and promises a lively, compelling Blog postings. One of the earliest pieces of work in this direction and relevant discussion. can be traced back to Dumais et al. in their now famous “Stuff I’ve Seen” paper at SIGIR’2003. Since then, desktop search, as well as built-in search support, in operating systems like in MacOS and Friday, May 11, 2007 Vista, have made (or remade) their apparition. While one could have thought that these solutions would solve, once and for all, the issue Searching Personal Content of searching personal content, it seems that the issue has shifted with Beatty, 10:30am-noon (CC2) the increasing use of Web services to store and maintain personal Moderator: content on various hosts. Indeed, users are storing more and more of Yoelle Maarek, Google Haifa Research Lab, Israel their favorite content, on remote servers not only for the purpose of Panelists: sharing but also in order to take advantage of free storage and ease of Susan Dumais, Microsoft Research maintenance. People commonly have several Web mail providers, a David Glazer, Google Inc. Blog hosting service, maybe a Web storage service, etc. As personal Andrew Tomkins, Yahoo! Research content becomes distributed and shared with many, it has become Chengxiang Zhai, University of Illinois at Urbana Champaign harder to search one’s own stuff.

Silver Sponsors

As the Internet’s fastest growing search engine, Ask.com offers unique Finnegan Henderson is dedicated to protecting the ideas and features like Binoculars, Zoom Related Search, and Smart Answers innovations that drive businesses around the world. With 300 that help millions of users daily find what they’re looking for faster. lawyers, eight offices, and four decades of experience specializing in Ask.com’s proprietary search technology, ExpertRank, is a departure intellectual property law, we offer full-service IP coverage in virtually from ranking technology used by other major search engines; instead every technology and product category. of ranking results based on the most popular pages on the Web, Ask. com’s results are derived from the most popular pages from topic- Our practice includes all aspects of patent, trademark, copyright, and based clusters of related sites. Founded in 1996, Ask.com became trade secret law, including counseling, prosecution, licensing, and a wholly-owned business of IAC/InterActiveCorp (NASDAQ: IACI) in litigation. We also represent clients on IP issues related to international 2005. trade, portfolio management, the Internet, e-commerce, government contracts, antitrust, and unfair competition.

Google is a global technology leader focused on improving the way Vodafone Group Plc provides an extensive range of mobile people connect with information. Google’s innovations in web search telecommunications services, including voice and data and advertising have made its website a top Internet destination and communications. Vodafone is the world’s leading international mobile its brand one of the most recognized in the world. Google maintains telecommunications group with equity interests in 25 countries and the world’s largest online index of websites and other content, and Partner Networks in a further 35, with a proportionate customer base Google makes this information freely available to anyone with an of over 191 million. For more information, please visit www.vodafone. Internet connection. Google’s automated search technology helps com. Vodafone has been working in a number of areas to improve people obtain nearly instant access to relevant information from its browsing capabilities on the mobile platform, most notably as a vast online index. Google is located on the Web at www.google.com founder-sponsor of W3C’s Mobile Web Initiative

39 www2007.org

GeoTV: Navigating Geocoded RSS to Create an IPTV Posters Experience President’s Hall Foyer (CC2) Yih-Farn Chen, Rittwik Jana, Giuseppe Di Fabbrizio, David Gibbon, Serban Jora, Bernard Renger, Bin Wei, AT&T Labs - Research Wednesday, May 9, 2007 Summarization of Online Image Collections via Implicit Feedback Systems Shane Ahern, Simon King, Mor Naaman, A No-Frills Architecture for Lightweight Answer Retrieval Rahul Nair, Yahoo! Research Berkeley Marius Pasca, Google Inc. System for Reminding a User of Information Obtained through Web4CE: Accessing Web-based Applications on Consumer Web Browsing Experience Devices Tetsushi Morita, Tetsuo Hidaka, Akimichi Tanaka, Walter Dees, Philips Research Labs Yasuhisa Kato, NTT Paul Shrubsole, Philips Research Labs The ScratchPad: Sensemaking Support for the Web David Gotz, IBM Research Developing Regions Towards Multi-granularity Multi-facet E-Book Retrieval Collaborative ICT for Indian Business Clusters Chong Huang, Chinese Academy of Sciences Soumya Roy, Motorola India Research Labs Yonghong Tian, Chinese Academy of Sciences Shantanu Biswas, Motorola India Research Labs Zhi Zhou, Chinese Academy of Sciences Delay Tolerant Applications for Low Bandwidth and Tiejun Huang, Peking University Intermittently Connected Users: the aAQUA Experience Visualizing Structural Patterns in Web Collections Saurabh Sahni, IIT Bombay Sadek Ali, University of Toronto Krithi Ramamritham, IIT Bombay Mariano Consens, University of Toronto Flavio Rizzolo, University of Toronto User Interfaces and Accessibility A Browser for a Public-Domain SpeechWeb XML and Web Data Richard Frost, University of Windsor Adaptive Record Extraction From Web Pages Xiaoli Ma, University of Windsor Justin Park, University of Calgary Yue Shi, University of Windsor Denilson Barbosa, University of Calgary A Novel Clustering-based RSS Aggregator Exploit Sequencing Views in Semantic Cache to Accelerate Xin Li, Peking University XPath Query Evaluation Jun Yan, Microsoft Research Asia Jianhua Feng, Na Ta, Yong Zhang, Zhihong Deng, Microsoft Research Asia Guoliang Li, Tsinghua University Lei Ji, Microsoft Research Asia Extensible Schema Documentation with XSLT 2.0 Weiguo Fan, Virginia Polytechnic Institue and State University Felix Michel, ETH Zurich Benyu Zhang, Microsoft Research Asia Erik Wilde, UC Berkeley Zheng Chen, Microsoft Research Asia Preserving XML Queries during Schema Evolution Adaptive Faceted Browser for Navigation in Open Information Mirella Moro, University of California, Riverside Spaces Susan Malaika, IBM Silicon Valley Lab Michal Tvarozek, Slovak University of Technology Lipyeow Lim, IBM T.J. Watson Research Center Maria Bielikova, Slovak University of Technology SPath: A Path Language for XML Schema An Assessment of Tag Presentation Techniques Erik Wilde, UC Berkeley Martin Halvey, UCD Dublin Felix Michel, ETH Zurich Mark Keane, UCD Dublin The Use of XML to Express a Historical Knowledge Base An Information State-Based Dialogue Manager for Making Katsuko T. Nakahira, Nagaoka University of Technology Voice Web Smarter Masashi Matsui, Nagaoka University of Technology Marta Gatius, Technical University of Catalonia Yoshiki Mikami, Nagaoka University of Technology Meritxell Gonzalez, Technical University of Catalonia U-Rest: An Unsupervised Record Extraction SysTem Elisabet Comelles, Technical University of Catalonia Yuan Kui Shen, MIT Behavior Based Web Page Evaluation David Karger, MIT Ganesan Velayathan, National Institute of Informatics XML-Based Multimodal Interaction Framework for Contact Seiji Yamada, National Institute of Informatics Center Applications Generating Efficient Labels to Facilitate Web Accessibility Nikolay Anisimov, Genesys Telecommunication Labs Leo Spalteholz, University of Victoria Brian Galvin, Genesys Telecommunication Labs Kin Fun Li, University of Victoria Herbert Ristock, Genesys Telecommunication Labs Nigel Livingston, University of Victoria XML-Based XML Schema Access Generation, Documentation and Presentation of Mathematical Erik Wilde, UC Berkeley Equations and Symbolic Scientific Expressions Using Pure Felix Michel, ETH Zurich HTML and CSS Kehinde Alabi, SUNY at Stony Brook

40 Thursday, May 10, 2007 Designing Efficient Sampling Techniques to Detect Webpage Updates Search and Data Mining Qingzhao Tan, Ziming Zhuang, Prasenjit Mitra, Academic Web Search Engine - Generating a Survey C. Lee Giles, Pennsylvania State University Automatically Determining the User Intent of Web Search Engine Queries Ye Wang, Zhihua Geng, Sheng Huang, Xiaoling Wang, Bernard J. Jansen, Pennsylvania State University Aoying Zhou, Fudan University Danielle Booth, Pennsylvania State University A Cautious Surfer for PageRank Amanda Spink, Queensland University of Technology Lan Nie, Baoning Wu, Brian Davison, Lehigh University EPCI: Extracting Potentially Copyright Infringement Texts from A Clustering Method for Web Data with Multi-Type Interrelated the Web Components Takashi Tashiro, Takanori Ueda, Taisuke Hori, Yu Hirate, Levent Bolelli, Seyda Ertekin, Ding Zhou, Hayato Yamana, Waseda University C. Lee Giles, Pennsylvania State University Efficient Training on Biased Minimax Probability Machine for A Large-Scale Study of Robots.txt Imbalanced Text Classification Yang Sun, Ziming Zhuang, C. Lee Giles Xiang Peng, Irwin King, The Chinese University of Hong Kong Pennsylvania State University Electoral Search Using the VerkiezingsKijker: An Experience A Link-Based Ranking Scheme for Focused Search Report Tony Abou-Assaleh, Tapajyoti Das, Weizheng Gao, Valentin Jijkoun, Maarten Marx, Maarten de Rijke, Yingbo Miao, Philip O’Brien, Frank van Waveren, University of Amsterdam Zhen Zhen, GenieKnows.com Exploration of Query Context for Information Retrieval A Link Classification based Approach to Website Topic Keke Cai, Chun Chen, Jiajun Bu, Hierarchy Generation Zhiming Kang, Zhejiang University Nan Liu, The Chinese University of Hong Kong First-order Focused Crawling Christopher Yang, The Chinese University of Hong Kong Qingyang Xu, Wanli Zuo, Jilin University A Search-based Chinese Word Segmentation Method Generative Models for Name Disambiguation Xin-Jing Wang, IBM China Research Lab Yang Song, Jian Huang, Isaac G. Councill, Jia Li, Wen Liu, Huazhong University of Science and Technology C. Lee Giles, Pennsylvania State University Yong Qin, IBM China Research Lab GigaHash: Scalable Minimal Perfect Hashing for Billions of Anchor-based Proximity Measures URLs Amruta Joshi, Ravi Kumar, Benjamin Reed, Denis Charles, Kumar Chellapilla, Anton Mityagin, Andrew Tomkins, Yahoo! Research Microsoft Live Labs Automatic Search Engine Performance Evaluation with Click- How NAGA Uncoils: Searching with Entities and Relations through Data Analysis Gjergji Kasneci, Fabian M. Suchanek, Maya Ramanath, Yiqun Liu, Tsinghua University Gerhard Weikum, Max-Planck-Institute Yupeng Fu, Tsinghua University Identifying Ambiguous Queries in Web Search Min Zhang, Tsinghua University Ruihua Song, Shanghai Jiao Tong University and Microsoft Shaoping Ma, Tsinghua University Research Asia Liyun Ru, Sohu Incorporation Zhenxiao Luo, Fudan University Automatic Searching of Tables in Digital Libraries Ji-Rong Wen, Microsoft Research Asia Ying Liu, Kun Bai, Prasenjit Mitra, C. Lee Giles, Yong Yu, Shanghai Jiao Tong University Pennsylvania State University Hsiao-Wuen Hon, Microsoft Research Asia Bayesian Network based Sentence Retrieval Model Learning Information Diffusion Process on the Web Keke Cai, Jiajun Bu, Chun Chen, Kangmiao Liu, Xiaojun Wan, Jianwu Yang, Peking University Wei Chen, Zhejiang University MedSearch: A Specialized Search Engine for Medical Brand Awareness and the Evaluation of Search Results Information Bernard J. Jansen, Mimi Zhang, Gang Luo, IBM T.J. Watson Research Center Ying Zhang, Pennsylvania State University Chunqiang Tang, IBM T.J. Watson Research Center Causal Relation of Queries from Temporal Logs Hao Yang, IBM T.J. Watson Research Center Yizhou Sun, Peking University Xing Wei, University of Massachusetts Amherst Ning Liu, Microsoft Research Aisa Mining Contiguous Sequential Patterns from Web Logs Kunqing Xie, Peking University Jinlin Chen, Queens College, CUNY Shuicheng Yan, University of Illinois at Urbana Champaign Terry Cook, Graduate Center, CUNY Benyu Zhang, Microsoft Research Asia Monitoring Evolution in Google’s and MSN’s Cache Directories Zheng Chen, Microsoft Research Asia Ioannis Anagnostopoulos, University of the Aegean Classifying Web Sites Review Spam Detection Christoph Lindemann, Lars Littig, University of Leipzig Nitin Jindal, Bing Liu, University of Illinois at Chicago Comparing Apples and Oranges: Normalized PageRank for Web Page Classification with Heterogeneous Data Fusion Evolving Graphs Zenglin Xu, Irwin King, Klaus Berberich, Max-Planck Institute for Informatics Michael R. Lyu, Chinese University of Hong Kong Srikanta Bedathur, Max-Planck Institute for Informatics Gerhard Weikum, Max-Planck Institute for Informatics Michalis Vazirgiannis, INRIA/FUTURS 41 www2007.org

Friday, May 11, 2007 Semantic Web A Management and Performance Framework for Semantic Web Search and Data Mining Servers Multi-factor Clustering for a Marketplace Search Interface Malena Mesarina, HP Labs Neel Sundaresan, Kavita Ganesan, Venugopal Srinivasmurthy, Hewlett Packard Roopnath Grandhi, eBay Research Labs Nic Lyons, Hewlett-Packard On Ranking Techniques for Desktop Search Craig Sayers, HP Labs Sara Cohen, Technion Carmel Domshlak, Technion A Probabilistic Semantic Approach for Discovering Web Naama Zwerdling, Technion - Israel Institute of Technology Services Query-Driven Indexing for Peer-to-Peer Text Retrieval Jiangang Ma, Victoria University GGleb Skobeltsyn, Toan Luu, EPFL Jinli Cao, La Trobe University Ivana Podnar Zarko, University of Zagreb Yanchun Zhang, Victoria University Martin Rajman, Karl Aberer, EPFL Acquiring Ontological Knowledge from Query Logs Query Topic Detection for Reformulation Satoshi Sekine, New York University Xuefeng He, Peking University Hisami Suzuki, Microsoft Research Jun Yan, Microsoft Research Asia Altering Document Term Vectors for Classification - Ontologies Ning Liu, Microsoft Research Aisa as Expectations of Co-occurrence Jinwen Ma, Peking University Meenakshi Nagarajan, Kno.e.sis Center, Wright State University Zheng Chen, Microsoft Research Asia Amit Sheth, Kno.e.sis Center, Wright State University SCAN: A Small-World Structured P2P Overlay for Multi- Marcos Aguilera, HP Labs Dimensional Queries Kimberly Keeton, HP Labs Xiaoping Sun, Graduate School of Chinese Academy of Arif Merchant, HP Labs Sciences Mustafa Uysal, HP Labs SRing: A Structured Non DHT P2P Overlay Supporting String Building and Managing Personalized Semantic Portals Range Queries Melike Sah, Wendy Hall, University of Southampton Xiaoping Sun, Xue Chen, Graduate School of Chinese Deriving Knowledge from Figures for Digital Libraries Academy of Sciences Xiaonan Lu, James Wang, Prasenjit Mitra, C. Lee Giles, Search Engine Retrieval of Changing Information Pennsylvania State University Yangsok Kim, University of Tasmania Development of a Semantic Web Based Mobile Byeong Ho Kang, University of Tasmania System Paul Compton, University of New South Wales Joo-Seong Jeon, Gi-Jeong Lee, KTF R&D Group Hiroshi Motoda, Osaka University Estimating the Cardinality of RDF Graph Patterns Search Engines and Their Public Interfaces: Which are the Angela Maduko, University of Georgia Most Synchronized? Kemafor Anyanwu, University of Georgia Frank McCown, Michael Nelson, Old Dominion University Amit Sheth, Kno.e.sis Center, Wright State University Sliding Window Technique for the Web Log Analysis Paul Schliekelman, University of Georgia Nikolai Buzikashvili, Institute of System Analysis, Russian Extending WebML towards Semantic Web Academy of Sciences Federico Michele Facca, Marco Brambilla, Politecnico di Milano Spam and Popularity Ratings for Combating Link Spam Image Annotation by Hierarchical Mapping of Features Mukesh Dalal, LDI Qiankun Zhao, Prasenjit Mitra, Summary Attributes and Perceived Search Quality C. Lee Giles, Pennsylvania State University Daniel Rose, A9.com Integrating Web Directories by Learning their Structures David Orr, Yahoo! Inc. Christopher Yang, The Chinese University of Hong Kong Raj Gopal Prasad Kantamneni, Yahoo! Inc. Jianfeng Lin, The Chinese University of Hong Kong Tag Clouds for Summarizing Web Search Results Learning Ontologies to Improve the Quality of Automatic Web Byron Kuo, Thomas Hentrich, Benjamin M. Good, Service Matching Mark Wilkinson, University of British Columbia Hui Guo, Stony Brook University Towards Efficient Dominant Relationship Exploration of the Anca Ivan, IBM TJ Watson Research Center Product Items on the Web Rama Akkiraju, IBM T. J. Watson Research Center Zhenglu Yang, Lin Li, Botao Wang, Ontology Engineering using Volunteer Labor Masaru Kitsuregawa, University of Tokyo Benjamin Good, University of British Columbia Understanding Web Search via a Learning Paradigm Mark D. Wilkinson, University of British Columbia Bernard J. Jansen, Brian Smith, Semantic Personalization of Web Portal Contents Danielle Booth, Pennsylvania State University Christina Tziviskou, Politecnico di Milano Using d-gap Patterns for Index Compression Marco Brambilla, Politecnico di Milano Jinlin Chen, Queens College, CUNY The Largest Scholarly Semantic Network...Ever. Terry Cook, Graduate Center, CUNY Johan Bollen, Marko Rodriguez, Herbert Van de Sompel, Utility Analysis for Topically Biased PageRank Los Alamos National Laboratory Christian Kohlschuetter, Paul - Alexandru Chirita, Wolfgang Nejdl, L3S / University of Hannover

42 Saturday, May 12, 2007 On Building Graphs of Documents with Artificial Ants Hanane Azzag, Laboratoire d’Informatique de l’Universite Social Networks de Paris-Nord BlogScope: Spatio-temporal Analysis of the Blogosphere Julien Lavergne, Laboratoire d’Informatique de l’Universite Nilesh Bansal, Nick Koudas, University of Toronto de Tours EOS: Expertise Oriented Search Using Social Networks Gilles Venturini, Laboratoire d’Informatique de l’Universite Juanzi Li, Tsinghua University de Tours Jie Tang, Tsinghua University Christiane Guinot, CE.R.I.E.S. Jing Zhang, Tsinghua University Towards a Scalable Search and Query Engine for the Web Qiong Luo, Hong Kong University of Science and Technology Aidan Hogan, Andreas Harth, Jurgen Umbrich, Yunhao Liu, Hong Kong University of Science and Technology Stefan Decker, Digital Enterprise Research Institute Mingcai Hong, Tsinghua University Web Mashup Scripting Language Exploring Social Dynamics in Online Media Sharing Marwan Sabbouh, Jeff Higginson, Danny Gagne, Martin Halvey, University College Dublin Salim Semy, MITRE Corporation Mark Keane, University College Dublin Finding Community Structure in Mega-scale Social Networks Web Security Ken Wakita, Tokyo Institute of Technology A Password Stretching Method with User Specific Salts Toshiyuki Tsurumi, Tokyo Institute of Technology ChangHee Lee, INITECH Life is Sharable: Mechanisms to Support and Sustain Blogging Heejo Lee, Korea University Life Experience Simple Authentication for the Web Yun-Maw Cheng, Tatung University Tim van der Horst, Brigham Young University Tzu-Chuan Chou, Academia Sinica Kent E. Seamons, Brigham Young University Wai Yu, Queen’s University Belfast Li-Chieh Chen, Tatung University Web Services Ching-Long Yeh, Tatung University A Kernel based Structure Matching for Web Services Search Meng-Chang Chen, Academia Sinica Jianjun Yu, Shengmin Guo, Hao Su, Measuring Credibility of Users in an E-learning Environment Zhang Hui, Beihang University Wei Wei, Royal Institute of Technology A Novel Collaborative Filtering-Based Framework for Jimmy Lee, The Chinese University of Hong Kong Personalized Services in M-Commerce Irwin King, The Chinese University of Hong Kong Qiudan Li, Chunheng Wang, Guanggang Geng, Modeling User Behavior in Recommender Systems based on Ruwei Dai, Chinese Academy of Sciences Maximum Entropy Crawling Multiple UDDI Business Registries Tomoharu Iwata, Kazumi Saito, Takeshi Yamada, NTT Eyhab Al-Masri, University of Guelph Parallel Crawling for Online Social Networks Qusay Mahmoud, University of Guelph Duen Horng Chau, Shashank Pandit, Samuel Wang, Discovering the Best Web Service Christos Faloutsos, Carnegie Mellon University Eyhab Al-Masri, University of Guelph Personalized Social & Real-Time Collaborative Search Qusay Mahmoud, University of Guelph Mukesh Dalal, LDI Mobile Shopping Assistant: Integration of Mobile Applications Towards Extracting Flickr Tag Semantics and Web Services Tye Rattenbury, Nathan Good, Huaigu Wu, SAP Labs Mor Naaman, Yahoo! Research Berkeley Yuri Natchetoi, SAP Canada Labs-Montreal On Automated Composition for Web Services Systems Zhongnan Shen, University of California at Santa Barbara AutoPerf: An Automated Load Generator and Performance Jianwen Su, University of California at Santa Barbara Measurement Tool for Multi-tier Software Systems Providing Session Management as a Core Business Service Shrirang Shirodkar, Varsha Apte, IIT Bombay Ismail Ari, HP Labs Construction by Linking: The Linkbase Method Jun Li, HP Labs Johannes Meinecke, University of Karlsruhe Riddhiman Ghosh, HP Labs Frederic Majer, University of Karlsruhe Mohamed Dekhil, HP Labs Martin Gaedke, Chemnitz University of Technology Toward Automating Regression Test Selection for Web Image Collector III: A Web Image-Gathering System with Bag- Services of-Keypoints Michael Ruth, University of New Orleans Keiji Yanai, Univ. of Electro-Communications Shengru Tu, University of New Orleans Mirror Site Maintenance Based on Evolution Associations of Towards Environment Generated Media: Object-participation- Web Directories type Weblog in Home Sensor Network Ling Chen, L3S / University of Hannover Takuya Maekawa, Yutaka Yanagisawa, Takeshi Okadome, NTT Sourav Bhowmick, Nanyang Technical University Towards Service Pool Based Approach for Services Discovery Wolfgang Nejdl, L3S / University of Hannover and Subscription Xuanzhe Liu, Li Zhou, Gang Huang, Hong Mei, Peking University

43 www2007.org

Conference Partners

In Cooperation with Supporting Organizations Steering Committee

Media Partners

44 Sponsor Contact Information

Platinum Sponsor Silver Sponsors Bronze Sponsors

AOL eBay Research Labs 22260 Pacific Boulevard Ask.com Ask.com Headquarters 2145 Hamilton Ave, Dulles, VA 20166 San Jose, CA USA http://dev.aol.com 555 12th Street, Suite 500 Oakland, CA USA 95125 http://labs.ebay.com Contact: 94607 Michael Cummins http://www.ask.com Technology Evangelist AOL Developer Network 22260 Pacific Boulevard Dulles, VA 20166 iCORE Phone: 1-703-265-7128 3608 - 33 Street NW [email protected] Finnegan, Henderson, Farabow, Calgary, AB Canada Garrett & Dunner LLP T2L 2A6 901 New York Avenue NW Phone: 1-403-210-5335 Washington, DC USA http://www.icore.ca Gold Sponsors 20001 http://www.finnegan.com

Microsoft Corporation 1 Microsoft Way Nokia Corporation Washington, USA Keilalahdentie 2-4 98052 Google P.O. Box 226 Phone: 1-425-722-5257 1600 Amphitheatre Parkway FIN-00045 Nokia Group http://www.microsoft.com Mountain View, CA USA Finland 94043 Phone: +358 (0) 7180 08000 Phone: 1-650-253-0000 www.nokia.com http://www.google.com

SAP Labs Canada In Cooperation with Supporting Organizations Steering Committee Other Sponsors 111 Rue Duke, bureau 2100 Montreal, PQ Canada H3C 2M1 Vodafone Phone: 1-514-879-7261 Vodafone House, The Connection Bennett Jones LLP [email protected] Newbury, Berkshire 4500 Bankers Hall East http://www.sap.com RG14 2FN, UK 855 2nd Street SW http://www.vodafone.com Calgary, AB T2P 4K7

Contact: Mr. Martin Kratz Yahoo! Research Phone: 1-403-298-3650 701 First Avenue Fax: 1-403-265-7219 Sunnyvale, CA USA [email protected] 94089 – 0703 Phone: 1-408-349-1859 http://www.yahoo.com

45 www2007.org

Social Events Thursday, May 10, 2007 WWW2007 Banquet Brewster’s MountView Barbecue, 6:00pm-9:00pm

Tuesday, May 8, 2007 Join us for a true western barbecue experience at the Brewster’s MountView Barbecue “donut tents” (indoor facility) on the outskirts Web History Opening Reception of Banff. Enjoy good food, and lots of it, with 2 complimentary drink Riverview Lounge, 5:00pm-6:00pm tickets, lively western music, and amazing after-dinner entertainment. In other words, lots of fun! Extra guest tickets may be purchased at Join us in the spacious Riverview Lounge to sample some wine and the registration desk. Bus transportation to/from the event will be cheese and rub shoulders with the early pioneers of the Web. The provided from the conference hotel, starting at 5:30pm. opening session of the Web History program follows at 6:00 pm. Extra tickets available at the registration desk if you do not have a Tuesday pass for WWW2007. Friday, May 11, 2007

Reception for WWW2007 Organizers Wednesday, May 9, 2007 Mount Stephen Hall, 7:00pm-9:00pm

WWW2007 Welcome Reception There will be a reception for WWW2007 organizers and selected Van Horne Ballroom, 6:00pm-8:00pm guests to celebrate a successful week in Banff. This reception is sponsored in part by the Web Science Research Initiative. Attendance Gather with old friends and make many new ones during the Welcome is by invitation only. Reception in the Van Horne Ballroom. Savour Canadian cuisine from “coast to coast”, quench your thirst with 2 complimentary beverages (with more available from the cash bar), and enjoy some spectacular pictures and fascinating commentary from extreme-sports ace Will Gadd (ice climbing, rock climbing, and more). Bring your camera, and watch for some surprise guest appearances!

WSRI will generate a research agenda for understanding the scientific, technical and social challenges underlying the growth of the Web. WSRI research projects will weigh questions such as:

How do we access information and assess its reliability?

The Massachusetts Institute of Technology and the University of By what means may we assure its use complies with social and legal Southampton have established a long-term research collaboration rules? that aims to facilitate and produce the fundamental scientific advances necessary to guide the future design and use of the World How will we preserve the Web over time? Wide Web. The founding Directors are Tim Berners-Lee, Wendy Hall, Nigel Shadbolt and Daniel Weitzner. WSRI will be headquartered at the Computer Science and Artificial Intelligence Laboratory (CSAIL) at MIT and at the School of Electronics The joint MIT-Southampton initiative provides a global forum for and Computer Science (ECS) at the University of Southampton. Initial scientists and scholars from around the world to collaborate on the plans call for joint research projects, workshops and student/faculty first multidisciplinary scientific research effort specifically designed to exchanges. study the Web at all scales of size and complexity, and to develop a new discipline of Web science for future generations of researchers. Contact WSRI: [email protected]

www.webscience.org

46 Author Index (Refereed Papers and Posters)

A Chen, Jinlin...... 41, 42 Galvin, Brian...... 40 Hui, Zhang...... 43 Abbadi, Amr El...... 29 Chen, Li-Chieh...... 43 Ganesan, Kavita...... 42 Huynh, David...... 31 Aberer, Karl...... 42 Chen, Ling...... 43 Gao, Weizheng...... 41 I Abou-Assaleh, Tony...... 41 Chen, Meng-Chang...... 43 Garg, Ashutosh...... 29 Immorlica, Nicole...... 31 Ackerman, Mark...... 29 Chen, Wei...... 41 Gatius, Marta...... 40 Ishizuka, Mitsuru...... 31 Adamic, Lada...... 29 Chen, Xue...... 42 Gatterbauer, Wolfgang...... 28 Ivan, Anca...... 42 Adar, Eytan...... 28 Chen, Yih-Farn...... 28, 40 Gehrke, Johannes...... 30 Iwata, Tomoharu...... 43 Adler, B. Thomas...... 29 Chen, Zheng...... 28, 31, 40, 41, 42 Geng, Guanggang...... 43 Agrawal, Divyakant...... 29 Cheng, Gong...... 32 Geng, Zhihua...... 41 J Aguilera, Marcos...... 42 Cheng, Yun-Maw...... 43 Geraci, Filippo...... 30 Jackson, Collin...... 31 Ahern, Shane...... 40 Chi, Yun...... 29 Gerke, Sebastian...... 32 Jain, Arvind...... 28 Ahmad, Rashid...... 33 Chim, Hung...... 28 Gerner, Nicholas...... 30 Jain, Kamal...... 31 Ahn, Jaewook...... 28 Chirita, Paul - Alexandru...... 32, 42 Ghinita, Gabriel...... 30 Jana, Rittwik...... 40 Ahn, Yong-Yeol...... 32 Chou, Tzu-Chuan...... 43 Ghosh, Arpita...... 30 Jansen, Bernard J...... 41, 42 Akkiraju, Rama...... 42 Chow, Jyh-Herng...... 29 Ghosh, Riddhiman...... 43 Jeon, Joo-Seong...... 42 Alabi, Kehinde...... 40 Cohen, Sara...... 42 Gibbon, David...... 28, 40 Jeong, Hawoong...... 32 Aleksovski, Zharko...... 32 Comelles, Elisabet...... 40 Giles, C. Lee...... 29, 41, 42 Ji, Lei...... 40 Ali, Kamal...... 30 Compton, Paul...... 42 Gkantsidis, Christos...... 32 Jiang, Haifeng...... 33 Ali, Sadek...... 40 Consens Mariano...... 40 Gligorov, Risto...... 32 Jijkoun, Valentin...... 41 Al-Masri, Eyhab...... 43 Cook, Terry...... 41, 42 Goenka, Amit...... 33 Jim, Trevor...... 31 Alzoubi, Hussein...... 30 Costache, Stefania...... 32 Gonzalez, Meritxell...... 40 Jindal, Nitin...... 41 Anagnostopoulos, Ioannis...... 41 Councill, Isaac G...... 41 Good, Benjamin M...... 42 Johnson, Erica...... 32 Anisimov, Nikola...... 40 Cranor, Lorrie...... 31 Good, Nathan...... 43 Jora, Serban...... 28, 40 Ankolekar, Anupriya...... 32, 33 Cuenca Grau, Bernardo...... 32 Goodman, Daniel James...... 33 Joshi, Amruta...... 41 Annapureddy, Siddhartha...... 32 Curbera, Francisco...... 33 Gotz, David...... 40 Joshi, Dhaval...... 32 Anyanwu, Kemafor...... 31, 42 Grady, Jonathan...... 28 Jurca, Radu...... 33 D Apte, Varsha...... 43 Grandhi, Roopnath...... 42 Dai, Ruwei...... 43 K Ari, Ismail...... 43 Gravino, Carmine...... 33 Dalal, Mukesh...... 42, 43 Kalnis, Panos...... 30 Arlitt, Martin...... 32 Gribble, Steven...... 28 Daniel, Florian...... 33 Kang, Byeong Ho...... 42 Azam, Farooque...... 33 Grimm, Stephan...... 33 Das Sarma, Anish...... 28 Kang, Zhiming...... 41 Azzag, Hanane...... 43 Groothuyse, Tobias...... 29 Das, Abhinandan...... 29 Kantamneni, Raj Gopal Prasad...... 42 Guha, Saikat...... 32 B Das, Tapajyoti...... 41 Karger, David...... 31, 40 Guinot, Christiane...... 43 Backstrom, Lars...... 29 Dasgupta, Anirban...... 30 Kasneci, Gjergji...... 32, 41 Gunawardena, Dinan...... 32 Bai, Kun...... 41 Datar, Mayur...... 29 Kato, Yasuhisa...... 40 Guo, Hui...... 42 Baker, Wendell...... 29 Davison, Brian...... 41 Kazakov, Yevgeny...... 32 Guo, Shengmin...... 43 Bansal, Nilesh...... 43 de Alfaro, Luca...... 29 Keane, Mark...... 40, 43 Gupta, Rajeev...... 29 Bao, Shenghua...... 30, 33 de Montgolfier, Fabien...... 30 Keeton, Kimberly...... 42 Gurevich, Maxim...... 30 Barbosa, Denilson...... 40 de Rijke, Maarten...... 41 Keidar, Idit...... 28 Guttman, Joshua D...... 31 Barbosa, Luciano...... 30 Decker, Stefan...... 43 Kim, Yangsok...... 42 Bar-Yossef, Ziv...... 28, 30 Dees, Walter...... 40 H King, Irwin...... 41, 43 Bayardo, Roberto...... 28 Dekhil, Mohamed...... 43 Halaschek-Wiener, Christian...... 31 King, Simon...... 40 Bedathur, Srikanta...... 41 Delbru, Renaud...... 32 Hall, Wendy...... 42 Kitsuregawa, Masaru...... 42 Benatallah, Boualem...... 33 Demers, Alan...... 30 Haller, Armin...... 32 Klein, Michael...... 33 Bennouas, Toufik...... 30 Deng, Xiaotie...... 28 Halpin, Harry...... 29 Kleinberg, Jon...... 29 Berberich, Klaus...... 41 Deng, Zhihong...... 40 Halvey, Martin...... 40, 43 Koenig-Ries, Birgitta...... 33 Bershad, Brian...... 28 Di Fabbrizio, Giuseppe...... 28, 40 Han, Dingyi...... 28 Kohlschuetter, Christian...... 42 Bhowmick, Sourav...... 43 Di Martino, Sergio...... 33 Han, Jie...... 28 Kolahi, Solmaz...... 33 Bielikova, Maria...... 40 Diaz, Oscar...... 32 Han, Seungyeop...... 32 Kolko, Beth...... 32 Binder, Walter...... 33 Dominowska, Ewa...... 30 Han, Wook-Shin...... 33 Kolovski, Vladimir...... 31 Birnbaum, Larry...... 31 Domshlak, Carmel...... 42 Handschuh, Siegfried...... 32 Koudas, Nick...... 43 Biswas, Shantanu...... 40 Doshi, Prashant...... 33 Harney, John...... 33 Krishnamurthi, Shriram...... 31 Bohunsky, Paul...... 28 Dou, Zhicheng...... 31 Harth, Andreas...... 43 Kroepl, Bernhard...... 28 Bolelli, Levent...... 41 Dourisboure, Yon...... 30 Hattori, Gen...... 30 Kroetzsch, Markus...... 32 Bollegala, Danushka...... 31 Drucker, Steven M...... 28 He, Daqing...... 28 Kuester, Ulrich...... 33 Bollen, Johan...... 42 Dumais, Susan...... 30 He, Xuefeng...... 42 Kukulenz, Dirk...... 31 Boneh, Dan...... 31 Dwork, Cynthia...... 29 Heifets, Abraham...... 33 Kumar, Ravi...... 28, 30, 31, 41 Bontcheva, Kalina...... 32 Hendler, James...... 31 Kumar, Viraj...... 33 E Booth, Danielle...... 41, 42 Hentrich, Thomas...... 42 Kuo, Byron...... 42 Elbaum, Sebastian...... 33 Borgs, Christian...... 31 Herley, Cormac...... 31 Kwak, Haewoon...... 32 Erman, Jeffrey...... 32 Borodin, Yevgen...... 28 Herzog, Marcus...... 28 Ertekin, Seyda...... 41 L Bortz, Andrew...... 31 Hicks, Michael...... 31 Etesami, Omid...... 31 Lam, Franky...... 33 Brambilla, Marco...... 42 Hidaka, Tetsuo...... 40 Lamparter, Steffen...... 33 F Brunner, Jean-Sebastien...... 32 Higginson, Jeff...... 43 Lavergne, Julien...... 43 Facca, Federico...... 42 Brusilovsky, Peter...... 28 Hino, Koji...... 29 Lee, ChangHee...... 43 Faloutsos, Christos...... 29, 43 Bu, Jiajun...... 41 Hirate, Yu...... 41 Lee, Gi-Jeong...... 42 Faltings, Boi...... 33 Buzikashvili, Nikolai...... 42 Ho, Howard...... 33 Lee, Heejo...... 43 Fan, Weiguo...... 40 Hoashi, Keiichiro...... 30 C Lee, Jimmy...... 43 Fei, Ben...... 30, 33 Hogan, Aidan...... 43 Cai, Chao...... 33 Leger, Michelle...... 33 Feng, Jianhua...... 40 Hon, Hsiao-Wuen...... 41 Cai, Keke...... 41 Leskovec, Jure...... 30 Ferrucci, Filomena...... 33 Hong, Jason...... 31 Cao, Jinli...... 42 Li, Guoliang...... 40 Fette, Ian...... 31 Hong, Mingcai...... 43 Carenini, Giuseppe...... 28 Li, Hang...... 30 Florencio, Dinei...... 31 Hori, Taisuke...... 41 Casati, Fabio...... 33 Li, Hua...... 28 Freire, Juliana...... 30 Horrocks, Ian...... 32 Chakrabarti, Deepayan...... 28 Li, Jia...... 41 Froehlich, Peter...... 30 Horvitz, Eric...... 30 Chakrabarti, Soumen...... 31 Li, Juanzi...... 43 Frost, Richard...... 40 Hu, Jian...... 28 Chan, Chee-Yong...... 33 Li, Jun...... 43 Fu, Yupeng...... 41 Huang, Chong...... 40 Charles, Denis...... 41 Li, Kin Fun...... 40 Huang, Gang...... 43 Chau, Duen Horng...... 29, 43 Li, Lin...... 42 G Huang, Jian...... 41 Chayes, Jennifer...... 31 Li, Qiudan...... 43 Gaedke, Martin...... 43 Huang, Peng...... 41 Chellapilla, Kumar...... 41 Li, Rui...... 33 Gagne, Danny...... 43 Huang, Sheng...... 41 Chen, Chun...... 41 Li, Xin...... 40 Gaitatzes Kostoulas, Margaret...... 33 Huang, Tiejun...... 40 Chen, Hao...... 29 Li, Yaoyong...... 32 47 www2007.org

Li, Zhang...... 33 Nakahira, Katsuko T...... 40 Seamons, Kent E...... 43 W Libkin, Leonid...... 33 Natchetoi, Yuri...... 43 Sekine, Satoshi...... 42 Wagner, Earl...... 31 Lim, Lipyeow...... 40 Nejdl, Wolfgang...... 32, 42, 43 Semy, Salim...... 43 Wakita, Ken...... 43 Lin, Chenxi...... 28 Nelson, Michael...... 42 Sen, Sayandeep...... 32 Wan, Xiaojun...... 41 Lin, Jianfeng...... 42 Ng, Raymond...... 28 Seshagiri, Sarita...... 32 Wang, Botao...... 42 Lindemann, Christoph...... 41 Ni, Xiaochuan...... 29 Shanmugasundaram, Jayavel...... 30 Wang, Chen...... 32 Ling, Xiao...... 29 Nie, Lan...... 41 Shen, Yuan Kui...... 40 Wang, Chunheng...... 43 Ling, Xu...... 29 Nie, Zaiqing...... 28 Shen, Zhongnan...... 43 Wang, Helen...... 31 Lingam, Sandeep...... 33 Niu, Cheng...... 28 Shepherd, Hana...... 29 Wang, James...... 42 Littig, Lars...... 41 Niu, Yuan...... 29 Sheth, Amit...... 31, 42 Wang, Ke...... 31 Liu, Bing...... 41 Novak, Jasmine...... 31 Shi, Shuming...... 28 Wang, Samuel...... 29, 43 Liu, Jiahui...... 31 Ntoulas, Alexandros...... 31 Shi, Yue...... 40 Wang, Xiaoling...... 41 Liu, Kangmiao...... 41 Shirodkar, Shrirang...... 43 Wang, Xin-Jing...... 41 O Liu, Nan...... 41 Shrubsole, Paul...... 40 Wang, Ye...... 41 O’Brien, Philip...... 41 Liu, Ning...... 41, 42 Shui, William...... 33 Wang, Yi-Min...... 29 Okadome, Takeshi...... 43 Liu, Tie-Yan...... 30 Silva, Daniel...... 33 Wei, Bin...... 28, 40 Olston, Christopher...... 30 Liu, Wen...... 41 Simmons, Isaac...... 28 Wei, Wei...... 43 Oren, Eyal...... 32 Liu, Xuanzhe...... 43 Simon, Rainer...... 30 Wei, Xing...... 41 Orr, David...... 42 Liu, Ying...... 41 Sivasubramanian, Swaminathan...... 29 Weikum, Gerhard...... 32, 41 Liu, Yiqun...... 41 P Skiadopoulos, Spiros...... 30 Weld, Daniel...... 28 Liu, Yunhao...... 43 Pacifici, Giovanni...... 29 Skobeltsyn, Gleb...... 42 Wen, Ji-Rong...... 28, 31, 41 Liu, Yuting...... 30 Pan, Yue...... 32 Smith, Brian...... 42 White, Ryen...... 28 Livingston, Nigel...... 40 Pandey, Sandeep...... 30 Song, Ruihua...... 31, 41 Wilde, Erik...... 40 Loeser, Alexander...... 30 Pandit, Shashank...... 29, 30, 43 Song, Xiaodan...... 29 Wilkinson, Mark D...... 42 Lu, Xiaonan...... 42 Pang, Bo...... 31 Song, Yang...... 41 Williamson, Carey...... 32 Luo, Gang...... 31, 41 Park, Justin...... 40 Spalteholz, Leo...... 40 Wolfson, Daniel C...... 32 Luo, Qiong...... 43 Parsia, Bijan...... 31 Spatscheck, Oliver...... 30 Wondra, Matthew...... 29 Luo, Zhenxiao...... 41 Pasca, Marius...... 28, 40 Spink, Amanda...... 41 Wong, Raymond...... 33 Luu, Toan...... 42 Pavlov, Dmitry...... 29 Spreitzer, Michael...... 29 Wu, Baoning...... 41 Lyons, Nic...... 42 Pellegrini, Marco...... 30 Srikant, Ramakrishnan...... 28 Wu, Huaigu...... 43 Lyu, Michael...... 41 Peng, Xiang...... 41 Srinivasmurthy, Venugopal...... 42 Wu, Xiaoyuan...... 30 Perez, Sandy...... 32 Srivinas, Kavitha...... 32 M X Perkins, Eric...... 33 Steinder, Malgorzata...... 29 Ma, Jiangang...... 42 Xie, Kunqing...... 41 Pierre, Guillaume...... 29 Stern, Mirco...... 33 Ma, Jinwen...... 42 Xie, Tao...... 31 Podnar Zarko, Ivana...... 42 Studer, Rudi...... 33 Ma, Li...... 32 Xu, Qingyang...... 41 Pollak, Bernhard...... 28 Su, Hang...... 29 Ma, Ming...... 29 Xu, Yabo...... 31 Polleres, Axel...... 32 Su, Hao...... 43 Ma, Shaoping...... 41 Xu, Zenglin...... 41 Popa, Lucian...... 33 Su, Jianwen...... 43 Ma, Wei-Ying...... 28 Xue, Gui-Rong...... 29, 30 Prasad, Archana...... 32 Su, Qi...... 29 Ma, Xiaoli...... 40 Punera, Kunal...... 28 Su, Zhong...... 30, 33 Y Ma, Yiming...... 28 Suchanek, Fabian M...... 32, 41 Yamada, Seiji...... 40 Ma, Yunxiao...... 28 Q Suel, Torsten...... 30 Yamada, Takeshi...... 43 Ma, Zhiming...... 30 Qi, Xin...... 30 Sugaya, Fumiaki...... 30 Yamana, Hayato...... 41 Madhusudan, Parthasarathy...... 33 Qin, Tao...... 30 Sun, Bingjun...... 29 Yan, Jun...... 40, 42 Maduko, Angela...... 31, 42 Qin, Yong...... 41 Sun, Chong...... 33 Yan, Shuicheng...... 41 Maekawa, Takuya...... 43 Qiu, Xiangpeng...... 33 Sun, Xiaoping...... 42 Yanagisawa, Yutaka...... 43 Mahanti, Anirban...... 32 Qiu, Zongyan...... 33 Sun, Yang...... 41 Yanai, Keiji...... 43 Mahdian, Mohammad...... 31 Qu, Yuzhong...... 32 Sun, Yizhou...... 41 Yang, Christopher...... 41, 42 Mahmoud, Qusay...... 43 R Sundaresan, Neel...... 42 Yang, Fan...... 30 Mahmud, Jalal...... 28 Rabinovich, Michael...... 30 Suzuki, Hisami...... 42 Yang, Hao...... 41 Majer, Frederic...... 43 Raghavan, Sriram...... 30 Swamy, Nikhil...... 31 Yang, Hongli...... 33 Malaika, Susan...... 40 Ragno, Robert...... 30 Syn, Sue Yeon...... 28 Yang, Jianwu...... 41 Manku, Gurmeet...... 28 Rajaram, Shyam...... 29 Yang, Qiang...... 29 Marten, Axel...... 33 Rajman, Martin...... 42 T Yang, Zhenglu...... 42 Martin, Evan...... 31 Ta, Na...... 40 Ramakrishnan, I.V...... 28 Yeh, Ching-Long...... 43 Marx, Maarten...... 41 Tan, Qingzhao...... 29, 41 Ramamritham, Krithi...... 29, 40 Yu, Jianju...... 43 Matera, Maristella...... 33 Tanaka Akimichi...... 40 Raman, Bhaskaran...... 32 Yu, Jin...... 33 Matsa, Morris...... 33 Tang, Chunqiang...... 29, 31, 41 Ramanath, Maya...... 41 Yu, Wai...... 43 Matsui, Masashi...... 40 Tang, Jie...... 43 Ramsdell, John D...... 31 Yu, Yong...... 28, 29, 30, 33, 41 Matsumoto, Kazunori...... 30 Rattenbury, Tye...... 43 Tashiro, Takashi...... 41 Z Matsuo, Yutaka...... 31 Reed, Benjamin...... 41 ten Kate, Warner...... 32 Zeng, Hua-Jun...... 28 McCarthy, Jay...... 31 Renger, Bernard...... 28, 40 Tian, Ying-li...... 31 Zhai, Cheng Xiang...... 29 McCown, Frank...... 42 Richardson, Matthew...... 30 Tian, Yonghong...... 40 Zhang, Benyu...... 31, 40, 41 Medhi, Indrani...... 32 Ristock, Herbert...... 40 Tolia, Niraj...... 29 Zhang, Jiangong...... 30 Mei, Hong...... 43 Rittwik, Jana...... 28 Tomasic, Anthony...... 28, 31 Zhang, Jing...... 43 Mei, Qiaozhu...... 29 Rizzolo, Flavio...... 40 Tomkins, Andrew...... 30, 31, 41 Zhang, Jun...... 29 Meinecke, Johannes...... 43 Robu, Valentin...... 29 Toyama, Kentaro...... 32 Zhang, Lei...... 32 Mendelsohn, Noah...... 33 Rodriguez, Marko...... 42 Tran, Thanh...... 32 Zhang, Mimi...... 41 Mendes, Emilia...... 33 Rodriguez, Pablo...... 32 Tseng, Belle...... 29 Zhang, Min...... 41 Merchant, Arif...... 42 Rose, Daniel...... 42 Tsurumi, Toshiyuki...... 43 Zhang, Xiang...... 32 Mesarina, Malena...... 42 Rose, Emma...... 32 Tu, Shengru...... 43 Zhang, Yanchun...... 42 Metwally, Ahmed...... 29 Roy, Soumya...... 40 Tvarozek, Michal...... 40 Zhang, Ying...... 41 Miao, Yingbo...... 41 Ru, Liyun...... 41 Tziviskou, Christina...... 42 Michel, Felix...... 40 Zhang, Yong...... 40 Ruth, Michael...... 43 U Mikami, Yoshiki...... 40 Zhang, Yue...... 31 Umbrich, Jurgen...... 43 Miller, Rob...... 31 S Zhao, Qiankun...... 42 Uysal, Mustafa...... 42 Mitra, Prasenjit...... 29, 41, 42 Sabbouh, Marwan...... 43 Zhen, Zhen...... 41 Mityagin, Anton...... 41 Sadeh, Norman...... 31 V Zhou, Aoying...... 41 Moon, Sue...... 32 Sagar, Aman...... 32 Vaithyanathan, Shivakumar...... 30 Zhou, Ding...... 41 Morita, Tetsushi...... 40 Sah, Melike...... 42 Van de Sompel, Herbert...... 42 Zhou, Li...... 43 Moro, Mirella...... 40 Sahni, Saurabh...... 40 van der Horst, Tim...... 43 Zhou, Xiaodong...... 28 Motahari Nezhad, Hamid R...... 33 Saint-Paul, Regis...... 33 van Harm, Frank...... 32 Zhou, Zhi...... 40 Motik, Boris...... 32 Saito, Kazumi...... 43 van Waveren, Frank...... 41 Zhu, Huaiyu...... 30 Motoda, Hiroshi...... 42 Sattler, Ulrike...... 32 Vazirgiannis, Michalis...... 41 Zhuang, Ziming...... 41 Satyanarayanan, M...... 29 Velayathan, Ganesan...... 40 Zimmerman, John...... 28 N Sayers, Craig...... 42 Venturini, Gilles...... 43 Zuo, Wanli...... 41 Naaman, Mor...... 40, 43 Scarr, Mark...... 30 Viswanathan, Mahesh...... 33 Zwerdling, Naama...... 42 Nagarajan, Meenakshi...... 42 Schliekelman, Paul...... 42 Vrandecic, Denny...... 32 Nair, Rahul...... 40 Schonfeld, Uri...... 28 48 Sponsors Platinum

Gold

Silver

Bronze

Other Sponsors

Exhibitors

ontotext Semantic Technology Lab

Student Travel Support DevTrack Sponsor ontotext Semantic Technology Lab

49 Photo Credit: Fairmont Banff Springs Hotel