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XML Information Modeling (Part II)

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XML Information Modeling (Part II) XML for Java Developers G22.3033-002 Session 4 - Main Theme XML Information Modeling (Part II) Dr. Jean-Claude Franchitti New York University Computer Science Department Courant Institute of Mathematical Sciences 1 Agenda n Summary of Previous Session n XML-Based Software Development n Business Engineering Methodology n XML Metadata Management n XML Linking/Pointer Language n XML Data Binding n Industry Specific Markup Languages n Assignment 2a+2b (due next week) 2 Summary of Previous Session n XML Physical Entities n Logical Structure of XML Documents n XML Document Navigation n Java APIs n Custom Markup Languages n Readings n Assignment #1b (due: 1 week) n Assignment #2a+2b (due: 2 weeks) 3 1 XML-Based Software Development n Business Engineering Methodology n Language + Process + Tools n e.g., Rational Unified Process (RUD) n XML Application Development Infrastructure n Metadata Management (e.g., XMI) n XML APIs (e.g., JAXP, JAXB) n XML Tools (e.g., XML Editors, XML Parsers) n XML Applications: n Application(s) of XML n XML-based applications/services n MOM & POP n Other Services n Application Infrastructure Frameworks 4 Business Engineering Methodology n Business Model/Architecture n Use Case View/Model n Application Model/Architecture n Logical and Process View/Models n Content, Data, and Process Model (e.g., OIM’s knowledge management, and database/datawarehousing models) n Application Infrastructure Model/Architecture n Implementation View n Component Model (e.g., OIM’s component and object model) n Technology Model/Architecture n Deployment View/Model n See Session 4 Sub-Topic 1, and Sub-Topic 2 presentations n See Session 4 Handout on “Business and Application Architecture Engineering” 5 XML Metadata Management n Issue: UML may not provides enough modeling views and enough expressive power in each view to represent a complete application n Possible Solutions: n Extend UML n See OIM’s Analysis and Design Model n Use Different Modeling Languages: n See Session 3 handout on “XML Information Modeling” (uses different models such as UML, XML, and ORM) n Use a Meta-Model: MOF and XMI n See Session 3 handouts on “UML, MOF, and XMI” and “OMG’s XML Metadata Interchange Format (XMI)” 6 2 XML Linking/Pointer Language n XLink n Allows elements to be inserted into XML documents in order to create and describe links between resources n See Article at http://www.simonstl.com/articles/xlink/ n XML Base n Equivalent of HTML BASE functionality generically in XML documents by defining an XML attribute named xml:base n Xpointer n Language used as a fragment identifier for any URI -reference that locates a resource of Internet media type text/xml or application/xml n Based on XPath n See Tools at http://www.xmlsoftware.com/xlink/ 7 XLink Example n <my:crossReference xmlns:my="http://example.com/" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="students.xml" xlink:role="studentlist" xlink:title="Student List" xlink:show="new" xlink:actuate="onRequest"> Current List of Students </my:crossReference> 8 XPointer Example n <!DOCTYPE SPEECH [ <!ELEMENT SPEECH (#PCDATA|SPEAKER|DIRECTION)*> <!ATTLIST SPEECH ID ID #IMPLIED> <!ELEMENT SPEAKER (#PCDATA)> <!ELEMENT DIRECTION (#PCDATA)>]> <SPEECH ID="a27"><SPEAKER>Polonius</SPEAKER> <DIRECTION>crossing downstage</DIRECTION>Fare you well, my lord. <DIRECTION>To Ros.</DIRECTION> You go to seek Lord Hamlet? There he is.</SPEECH> n id(a27).child(2,DIRECTION) Selects the second "DIRECTION" element (whose content is " To Ros.") n id(a27).child(2,#text) Selects the second text region , "Fare you well, my lord." (The line break between the SPEAKER and DIRECTION 9 elements is the first text region.) 3 XML Base Example n <?xml version="1.0"?> <html xmlns="http://www.w3.org/TR/xhtml1/strict" xml:base="http://somewhere.org"> <head> <title>Virtual Library</title> </head> <body> <p>See <a href="new.xml">what's new</a>!</p> <p>Check out the hot picks of the day!</p> <ol xml:base="/hotpicks"> <li><a href="pick1.xml">Hot Pick #1</a></li> <li><a href="pick2.xml">Hot Pick #2</a></li> <li><a href="pick3.xml">Hot Pick #3</a></li> </ol> </body> </html> n "what's new" resolves to the URI "http://somewhere.org/new.xml" \ n "Hot Pick #1" resolves to the URI "http://somewhere.org/hotpicks/pick1.xml" n "Hot Pick #2" resolves to the URI "http://somewhere.org/hotpicks/pick2.xml" 10 n "Hot Pick #3" resolves to the URI "http://somewhere.org/hotpicks/pick3.xml" XML Data Binding n Aims to automatically generate substantial portions of the Java platform code that processes XML data n A Sun project, codenamed “Adelard” n See JSR-31 XML Data Binding Specification n see http://java.sun.com/xml/jaxp-1.0.1/docs/binding/DataBinding.html 11 Industry Specific Markup Languages (see http://www.oasis-open.org/cover/xml.html#contentsApps ) n Ontology Interchange Language (OIL) n OMG Common Warehouse MetaData Interchange (CWMI) n OMG Model Driven Architecture (MDA) n Open Financial Exchange (OFX) n Straight Through Processing Markup Language (STPML) n Electronic Commerce Modeling Language (ECML) n OASIS Business Transactions Technical Committee (OASISBT) n BizTalk Framework (BizTalk) n Commerce XML (cXML) n RosettaNet (RosettaNet) n Business Process Modeling Language (BPML) 12 4 Readings n Readings n XML Development with Java 2: Chapter 4 n Professional Java XML: Chapters 5, 6, 9, and 10 n XML and Java: Chapter 2 n Handouts posted on the course web site n Review XPath 1.0, XLink, XPointer, XML Base, XML Infoset, XML Inclusion W3C Recs n Project Frameworks Setup (ongoing) n Apache’s Web Server, TomCat/JRun, and Cocoon n Apache’s Xerces, Xalan, Saxon n Antenna House XML Formatter, Apache’s FOP, X-smiles n Visibroker 4.5, WebLogic 6.1 n POSE & KVM (See Session 3 handout) 13 Assignment n Assignment #2a: n This part of the project focuses on the application business model discovery using XML information modeling technology. The discovery process should adhere to the following steps: (a) Documenting the information structure, (b) Representing the information structure in XML form, (c) Defining XML DTDs and/or Schemas n More specific project related information, and extra credit assignments will be provided during the session 14 Assignment (continued) n Assignment #2b: n This part of the project relies on the business model discovery process suggested in assignment #2a, and should demonstrate the use of UML use cases to support the development of XML DTDs and/or Schemas n Deliverables: n XML DTDs and/or Schemas (partial) n XMI Model (partial) n Use Objects by Design xmi-to-html.xsl style sheet and Cocoon framework to present the resulting model n Develop the model using Rational Rose or Java, and the XMI toolkit 15 5 Next Session: XML Information Processing (Part I) n Document Object Model (DOM) n Simple API for XML (SAX) n XML Parsers 16 6.
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