Execution of SPARQL Query Using Apache Jena Fuseki Server in AISHE Domain
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Mapping Spatiotemporal Data to RDF: a SPARQL Endpoint for Brussels
International Journal of Geo-Information Article Mapping Spatiotemporal Data to RDF: A SPARQL Endpoint for Brussels Alejandro Vaisman 1, * and Kevin Chentout 2 1 Instituto Tecnológico de Buenos Aires, Buenos Aires 1424, Argentina 2 Sopra Banking Software, Avenue de Tevuren 226, B-1150 Brussels, Belgium * Correspondence: [email protected]; Tel.: +54-11-3457-4864 Received: 20 June 2019; Accepted: 7 August 2019; Published: 10 August 2019 Abstract: This paper describes how a platform for publishing and querying linked open data for the Brussels Capital region in Belgium is built. Data are provided as relational tables or XML documents and are mapped into the RDF data model using R2RML, a standard language that allows defining customized mappings from relational databases to RDF datasets. In this work, data are spatiotemporal in nature; therefore, R2RML must be adapted to allow producing spatiotemporal Linked Open Data.Data generated in this way are used to populate a SPARQL endpoint, where queries are submitted and the result can be displayed on a map. This endpoint is implemented using Strabon, a spatiotemporal RDF triple store built by extending the RDF store Sesame. The first part of the paper describes how R2RML is adapted to allow producing spatial RDF data and to support XML data sources. These techniques are then used to map data about cultural events and public transport in Brussels into RDF. Spatial data are stored in the form of stRDF triples, the format required by Strabon. In addition, the endpoint is enriched with external data obtained from the Linked Open Data Cloud, from sites like DBpedia, Geonames, and LinkedGeoData, to provide context for analysis. -
Is a SPARQL Endpoint a Good Way to Manage Nursing Documentation
Is a SPARQL Endpoint a Good way to Manage Nursing Documentation Is a SPARQL Endpoint a good way to Manage Nursing Documentation by Muhammad Aslam Supervisor: Associate Professor Jan Pettersen Nytun Project report for Master Thesis in Information & Communication Technology IKT 590 in Spring 2014 University of Agder Faculty of Engineering and Science Grimstad, 2 June 2014 Status: Final Keywords: Semantic Web, Ontology, Jena, SPARQL, Triple Store, Relational Database Page 1 of 86 Is a SPARQL Endpoint a Good way to Manage Nursing Documentation Abstract. In Semantic Web there are different technologies available, among these technologies ontologies are considered a basic technology to promote semantic management and activities. An ontology is capable to exhibits a common, shareable and reusable view of a specific application domain, and they give meaning to information structures that are exchanged by information systems [63]. In this project our main goal is to develop an application that helps to store and manage the patient related clinical data. For this reason first we made an ontology, in ontology we add some patient related records. After that we made a Java application in which we read this ontology by the help of Jena. Then we checked this application with some other database solutions such as Triple Store (Jena TDB) and Relational database (Jena SDB). After that we performed SPARQL Queries to get results that reads from databases we have used, on the basis of results that we received after performing SPARQL Queries, we made an analysis on the performance and efficiency of databases. In these results we found that Triple Stores (Jena TDB) have capabilities to response very fast among other databases. -
Open Web Ontobud: an Open Source RDF4J Frontend
Open Web Ontobud: An Open Source RDF4J Frontend Francisco José Moreira Oliveira University of Minho, Braga, Portugal [email protected] José Carlos Ramalho Department of Informatics, University of Minho, Braga, Portugal [email protected] Abstract Nowadays, we deal with increasing volumes of data. A few years ago, data was isolated, which did not allow communication or sharing between datasets. We live in a world where everything is connected, and our data mimics this. Data model focus changed from a square structure like the relational model to a model centered on the relations. Knowledge graphs are the new paradigm to represent and manage this new kind of information structure. Along with this new paradigm, a new kind of database emerged to support the new needs, graph databases! Although there is an increasing interest in this field, only a few native solutions are available. Most of these are commercial, and the ones that are open source have poor interfaces, and for that, they are a little distant from end-users. In this article, we introduce Ontobud, and discuss its design and development. A Web application that intends to improve the interface for one of the most interesting frameworks in this area: RDF4J. RDF4J is a Java framework to deal with RDF triples storage and management. Open Web Ontobud is an open source RDF4J web frontend, created to reduce the gap between end users and the RDF4J backend. We have created a web interface that enables users with a basic knowledge of OWL and SPARQL to explore ontologies and extract information from them. -
A Performance Study of RDF Stores for Linked Sensor Data
Semantic Web 1 (0) 1–5 1 IOS Press 1 1 2 2 3 3 4 A Performance Study of RDF Stores for 4 5 5 6 Linked Sensor Data 6 7 7 8 Hoan Nguyen Mau Quoc a,*, Martin Serrano b, Han Nguyen Mau c, John G. Breslin d , Danh Le Phuoc e 8 9 a Insight Centre for Data Analytics, National University of Ireland Galway, Ireland 9 10 E-mail: [email protected] 10 11 b Insight Centre for Data Analytics, National University of Ireland Galway, Ireland 11 12 E-mail: [email protected] 12 13 c Information Technology Department, Hue University, Viet Nam 13 14 E-mail: [email protected] 14 15 d Confirm Centre for Smart Manufacturing and Insight Centre for Data Analytics, National University of Ireland 15 16 Galway, Ireland 16 17 E-mail: [email protected] 17 18 e Open Distributed Systems, Technical University of Berlin, Germany 18 19 E-mail: [email protected] 19 20 20 21 21 Editors: First Editor, University or Company name, Country; Second Editor, University or Company name, Country 22 Solicited reviews: First Solicited Reviewer, University or Company name, Country; Second Solicited Reviewer, University or Company name, 22 23 Country 23 24 Open reviews: First Open Reviewer, University or Company name, Country; Second Open Reviewer, University or Company name, Country 24 25 25 26 26 27 27 28 28 29 Abstract. The ever-increasing amount of Internet of Things (IoT) data emanating from sensor and mobile devices is creating 29 30 new capabilities and unprecedented economic opportunity for individuals, organisations and states. -
Storage, Indexing, Query Processing, And
Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 23 May 2020 doi:10.20944/preprints202005.0360.v1 STORAGE,INDEXING,QUERY PROCESSING, AND BENCHMARKING IN CENTRALIZED AND DISTRIBUTED RDF ENGINES:ASURVEY Waqas Ali Department of Computer Science and Engineering, School of Electronic, Information and Electrical Engineering (SEIEE), Shanghai Jiao Tong University, Shanghai, China [email protected] Muhammad Saleem Agile Knowledge and Semantic Web (AKWS), University of Leipzig, Leipzig, Germany [email protected] Bin Yao Department of Computer Science and Engineering, School of Electronic, Information and Electrical Engineering (SEIEE), Shanghai Jiao Tong University, Shanghai, China [email protected] Axel-Cyrille Ngonga Ngomo University of Paderborn, Paderborn, Germany [email protected] ABSTRACT The recent advancements of the Semantic Web and Linked Data have changed the working of the traditional web. There is a huge adoption of the Resource Description Framework (RDF) format for saving of web-based data. This massive adoption has paved the way for the development of various centralized and distributed RDF processing engines. These engines employ different mechanisms to implement key components of the query processing engines such as data storage, indexing, language support, and query execution. All these components govern how queries are executed and can have a substantial effect on the query runtime. For example, the storage of RDF data in various ways significantly affects the data storage space required and the query runtime performance. The type of indexing approach used in RDF engines is key for fast data lookup. The type of the underlying querying language (e.g., SPARQL or SQL) used for query execution is a key optimization component of the RDF storage solutions. -
A Survey of Geospatial Semantic Web for Cultural Heritage
heritage Review A Survey of Geospatial Semantic Web for Cultural Heritage Ikrom Nishanbaev 1,* , Erik Champion 1 and David A. McMeekin 2 1 School of Media, Creative Arts, and Social Inquiry, Curtin University, Perth, WA 6845, Australia; [email protected] 2 School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia; [email protected] * Correspondence: [email protected] Received: 23 April 2019; Accepted: 16 May 2019; Published: 20 May 2019 Abstract: The amount of digital cultural heritage data produced by cultural heritage institutions is growing rapidly. Digital cultural heritage repositories have therefore become an efficient and effective way to disseminate and exploit digital cultural heritage data. However, many digital cultural heritage repositories worldwide share technical challenges such as data integration and interoperability among national and regional digital cultural heritage repositories. The result is dispersed and poorly-linked cultured heritage data, backed by non-standardized search interfaces, which thwart users’ attempts to contextualize information from distributed repositories. A recently introduced geospatial semantic web is being adopted by a great many new and existing digital cultural heritage repositories to overcome these challenges. However, no one has yet conducted a conceptual survey of the geospatial semantic web concepts for a cultural heritage audience. A conceptual survey of these concepts pertinent to the cultural heritage field is, therefore, needed. Such a survey equips cultural heritage professionals and practitioners with an overview of all the necessary tools, and free and open source semantic web and geospatial semantic web platforms that can be used to implement geospatial semantic web-based cultural heritage repositories. -
Diplomová Práce Přenos Dat Z Registru SITS Ve Formátu DASTA
Západočeská univerzita v Plzni Fakulta aplikovaných věd Katedra informatiky a výpočetní techniky Diplomová práce Přenos dat z registru SITS (Safe Impementation of Treatments in Stroke) ve formátu DASTA Plzeň, 2012 Bc. Pavel Karlík 1 Originální zadání práce 2 Prohlášení: Prohlašuji, že jsem diplomovou práci vypracoval samostatně a výhradně s použitím citovaných pramenů, pokud není explicitně uvedeno jinak. V Plzni dne …………… Bc. Pavel Karlík ………………… 3 Abstract Data Transfer from the SITS Registry (Safe Implementation of Treatments in Stroke) in the Format of DASTA The goal of this master´s thesis is to analyze the data standards in the field of medical applications with focus on the format DASTA, work with them and developing a suitable web-based tool for doctors in the FN Plzeň hospital to simplify the forms filling in the SITS registry. Application will be user-friendly with the focus on one-click access, multi-lingual, adaptive to changes, and fill in the forms with the data from hospital database stored in the DASTA. In the background will send same data also to the Department of Computer Science and Engineering in the University of West Bohemia for future research. 4 Poděkování Tímto bych chtěl poděkovat paní Doc. Dr. Ing. Janě Klečkové za neutuchající optimismus a podporu, který mně byl motivací během celé doby mé práce. Dále si cením věnovaného času a pomoci, která mi byla velkou podporou při tvorbě. Poděkování patří také mé rodině a blízkým za jejich ohleduplnost a motivaci. 5 Obsah 1 ÚVOD ............................................................................................................ 9 2 DATOVÉ STANDARDY .................................................................................. 10 2.1 STANDARDY OBECNĚ ......................................................................................... 10 2.1 DASTA .......................................................................................................... 12 2.1.1 Historie ................................................................................................ -
Performance of RDF Library of Java, C# and Python on Large RDF Models
et International Journal on Emerging Technologies 12(1): 25-30(2021) ISSN No. (Print): 0975-8364 ISSN No. (Online): 2249-3255 Performance of RDF Library of Java, C# and Python on Large RDF Models Mustafa Ali Bamboat 1, Abdul Hafeez Khan 2 and Asif Wagan 3 1Department of Computer Science, Sindh Madressatul Islam University (SMIU), Karachi, (Sindh), Pakistan. 2Department of Software Engineering, Sindh Madressatul Islam University (SMIU) Karachi, (Sindh), Pakistan. 3Department of Computer Science, Sindh Madressatul Islam University (SMIU), Karachi (Sindh), Pakistan. (Corresponding author: Mustafa Ali Bamboat) (Received 03 November 2020, Revised 22 December 2020, Accepted 28 January 2021) (Published by Research Trend, Website: www.researchtrend.net) ABSTRACT: The semantic web is an extension of the traditional web, in which contents are understandable to the machine and human. RDF is a Semantic Web technology used to create data stores, build vocabularies, and write rules for approachable LinkedData. RDF Framework expresses the Web Data using Uniform Resource Identifiers, which elaborate the resource in triples consisting of subject, predicate, and object. This study examines RDF libraries' performance on three platforms like Java, DotNet, and Python. We analyzed the performance of Apache Jena, DotNetRDF, and RDFlib libraries on the RDF model of LinkedMovie and Medical Subject Headings (MeSH) in aspects measuring matrices such as loading time, file traversal time, query response time, and memory utilization of each dataset. SPARQL is the RDF model's query language; we used six queries, three for each dataset, to analyze each query's response time on the selected RDF libraries. Keywords: dotNetRDF, Apache Jena, RDFlib, LinkedMovie, MeSH. -
Towards a Service-Oriented Architecture for a Mobile Assistive System with Real-Time Environmental Sensing
Tsinghua Science and Technology Volume 21 Issue 6 Article 1 2016 Towards a Service-Oriented Architecture for a Mobile Assistive System with Real-time Environmental Sensing Darpan Triboan the Context, Intelligence, and Interaction Research Group (CIIRG), De Montfort University, Leicester, LE1 9BH, UK. Liming Chen the Context, Intelligence, and Interaction Research Group (CIIRG), De Montfort University, Leicester, LE1 9BH, UK. Feng Chen the Context, Intelligence, and Interaction Research Group (CIIRG), De Montfort University, Leicester, LE1 9BH, UK. Zumin Wang the Department of Information Engineering, Dalian University, Dalian 116622, China. Follow this and additional works at: https://tsinghuauniversitypress.researchcommons.org/tsinghua- science-and-technology Part of the Computer Sciences Commons, and the Electrical and Computer Engineering Commons Recommended Citation Darpan Triboan, Liming Chen, Feng Chen et al. Towards a Service-Oriented Architecture for a Mobile Assistive System with Real-time Environmental Sensing. Tsinghua Science and Technology 2016, 21(6): 581-597. This Research Article is brought to you for free and open access by Tsinghua University Press: Journals Publishing. It has been accepted for inclusion in Tsinghua Science and Technology by an authorized editor of Tsinghua University Press: Journals Publishing. TSINGHUA SCIENCE AND TECHNOLOGY ISSNll1007-0214ll01/09llpp581-597 Volume 21, Number 6, December 2016 Towards a Service-Oriented Architecture for a Mobile Assistive System with Real-time Environmental Sensing Darpan Triboan, Liming Chen, Feng Chen, and Zumin Wang Abstract: With the growing aging population, age-related diseases have increased considerably over the years. In response to these, Ambient Assistive Living (AAL) systems are being developed and are continually evolving to enrich and support independent living. -
Building and Utilizing Linked Data from Massive Open Online Courses
MOOCLink: Building and Utilizing Linked Data from Massive Open Online Courses Sebastian Kagemann Srividya Kona Bansal Arizona State University—Polytechnic Campus Arizona State University—Polytechnic Campus CRA-W Distributed Research Experience Department of Engineering Mesa, Arizona 85212, USA Mesa, Arizona 85212, USA [email protected] [email protected] Abstract—Linked Data is an emerging trend on the web with Linked Data available for MOOCs or an ontology that denotes top companies such as Google, Yahoo and Microsoft promoting properties unique to MOOCs. their own means of marking up data semantically. Despite the increasing prevalence of Linked Data, there are a limited number In order to incorporate MOOC data into the Linked Data of applications that implement and take advantage of its cloud as well as demonstrate the potential of Linked Data when capabilities, particularly in the domain of education. We present applied to education, we propose to (i) build or extend an RDF a project, MOOCLink, which aggregates online courses as ontology that denotes MOOC properties and relationships (ii) Linked Data and utilizes that data in a web application to use our ontology to generate Linked Data from multiple discover and compare open courseware. MOOC providers and (iii) implement this data in a practical web application that allows users to discover courses across Keywords—linked data; education; ontology engineering different MOOC providers. I. INTRODUCTION II. BACKGROUND Linked Data involves using the Web to create typed links A. Resource Description Framework between data from different sources [1]. Source data may vary in location, size, subject-matter and how congruously it is The most notable model for Linked Data is the Resource structured. -
The World of Knowledge Graphs in Oracle Databases
The World of Knowledge Graphs in Oracle Databases Collaboration between Semantic Web Company and Oracle Emma Thomas Sebastian Gabler Principal Solutions Architect Director of Sales Oracle A-team Semantic Web Company November 19th 2019 2 Confidential – © 2019 Oracle Restricted Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, timing, and pricing of any features or functionality described for Oracle’s products may change and remains at the sole discretion of Oracle Corporation. 3 The World of Knowledge Graphs in Oracle Databases Introduction to Knowledge Graphs Oracle Database Spatial and Graph - RDF Focus Oracle RDF4J adapter Using PoolParty for Search, Similarity, Recommendation and Visualisation 4 Confidential – © 2019 Oracle Restricted Graphs are Everywhere Heiko Paulheim. Journal of Web Semantics: Special Issue on Knowledge Graph Refinement. “Knowledge Graph Refinement: A Survey of Approaches and Evaluation Methods.” [September, 2016] 5 Confidential – © 2019 Oracle Restricted An Opte Project Visualisation of routing paths through a portion of the Internet By The Opte Project - Originally from the English Wikipedia; description page is/was here., CC BY 2.5, https://commons.wikimedia.org/w/index.php?cu rid=1538544 6 What is a Knowledge Graph? Knowledge graphs are large networks of entities, their semantic types, properties, and relationships between entities1. Key Features: Knowledge “Things, not strings” Database Base Knowledge global unique identifiers Graph Formal structure/semantics machine processable, unambiguous Linked descriptions Graph resources are described by their connections 1. -
Graphdb-Free.Pdf
GraphDB Free Documentation Release 8.5 Ontotext Jun 17, 2019 CONTENTS 1 General 1 1.1 About GraphDB...........................................2 1.2 Architecture & components.....................................2 1.2.1 Architecture.........................................2 1.2.1.1 RDF4J.......................................3 1.2.1.2 The Sail API....................................4 1.2.2 Components.........................................4 1.2.2.1 Engine.......................................4 1.2.2.2 Connectors.....................................5 1.2.2.3 Workbench.....................................5 1.3 GraphDB Free............................................5 1.3.1 Comparison of GraphDB Free and GraphDB SE......................6 1.4 Connectors..............................................6 1.5 Workbench..............................................6 2 Quick start guide 9 2.1 Run GraphDB as a desktop installation...............................9 2.1.1 On Windows........................................ 10 2.1.2 On Mac OS......................................... 10 2.1.3 On Linux.......................................... 10 2.1.4 Configuring GraphDB................................... 10 2.1.5 Stopping GraphDB..................................... 11 2.2 Run GraphDB as a stand-alone server................................ 11 2.2.1 Running GraphDB..................................... 11 2.2.1.1 Options...................................... 11 2.2.2 Configuring GraphDB................................... 12 2.2.2.1 Paths and network settings...........................