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SparqPlug : Legacy HTML, SPARQL, and the DOM Peter Coetzee - PowerPoint PPT Presentation

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Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Peter Coetzee Tom Heath Imperial College London Talis Information Ltd. Enrico Motta Knowledge Media Institute Generating Linked Data from SparqPlug :

  1. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Peter Coetzee Tom Heath Imperial College London Talis Information Ltd. Enrico Motta Knowledge Media Institute

  2. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM  The Problem  Current Approaches  SparqPlug's Background  SparqPlug's Approach  Linked Data  Anatomy of a Job  Maintenance  Wrap-Up

  3. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM The Problem  Bootstrapping the Web of Data  Inertia for webmasters to convert  Risks of doing so blindly – Good Linked Data!  Difficult and time-consuming  Triplify  SquirrelRDF  etc

  4. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Current Approaches  Piggy Bank & Thresher: Easy to use screen scrapers → RDF Silo  Sponger & Triplr: Requires a marked up source  SPAT: Great approach, implementations??  XSLT with XQuery: Another language to learn, could be more expressive and flexible

  5. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM SparqPlug's Background  Developed in Summer of 2007  Funded by OpenKnowledge Project, development took place at KMi  Currently hosted at KMi  Built on Java, Jena, Tomcat, MySQL, NG4J  http://sparqplug.rdfize.com/

  6. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM SparqPlug's Approach  Tidy and DOM2RDF  Query the DOM directly with SPARQL  All the expressivity of a declarative query language  Proprietary extensions – e.g. Property Functions  DOM2SPARQL  Let SparqPlug manage the entire process, from extraction to de-referencing

  7. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM SparqPlug's Approach

  8. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Linked Data  Content Negotiation handled automatically  URIs generated in a separate namespace and forwarded through Tomcat to the SparqPlug application  Property Functions to help process data  SPARQL endpoint automatically created for each data set

  9. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Anatomy of a Job  You give:  Prototypical Query (SPARQL)  Link Query (SPARQL)  Graph Name Generator (RegExp)  We create:  Maintenance data  Linked Data constructs  RDF!

  10. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Maintenance  Source graph hashed at SPARQL CONSTRUCT time  Hash then checked periodically for updated data  Graph regenerated and UNION'd with existing RDF in each named graph

  11. Generating Linked Data from SparqPlug : Legacy HTML, SPARQL, and the DOM Wrap-Up  SparqPlug offers a simple , partially automated and scalable solution to the problem of creation and maintenance of RDF data from an arbitrary HTML data source  http://sparqplug.rdfize.com/  Questions?  peter @ coetzee . org

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