Twinkle: A SPARQL Query Tool

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Introduction to Twinkle presented at an Oxon Swig meeting in March 2008

Introduction to Twinkle presented at an Oxon Swig meeting in March 2008

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  • 1. Twinkle: A SPARQL Query Tool Leigh Dodds, Oxford SWIG, March 2008 Photo Credit: Glen Bowman
  • 2. What Is It? A GUI for writing and running SPARQL queries
  • 3.  
  • 4. Data Sources Local Files Remote Files Jena Databases Any combination of these
  • 5. SPARQL Endpoints Complete SPARQL Client Useful pre-configured sources, e.g. DBPedia
  • 6. But Wait, There’s More RDFS and OWL Inferencing Jena Rules Engine And any combination
  • 7.  
  • 8. Demonstration (Where It All Goes Wrong)
  • 9. The Secret Sauce ARQ SPARQL query engine The Jena Assembler API
  • 10. Jena Assembler API Declaratively describe how to build a Jena Model URIs, Databases Add default content Apply schemas, reasoning
  • 11.
    • :periodicTable a ja:MemoryModel
    • ; ja:content [
    • ja:externalContent
    • <http://www.daml.org/2003/01/periodictable/PeriodicTable.owl>
    • ]
    • ; rdfs:label &quot;Periodic Table&quot;
    • .
    Config Example
  • 12.
    • :nlm ja:modelName &quot;nlm-data&quot;
    • ; ja:connection :nlm-connection
    • ; rdfs:label &quot;NLM Data&quot;
    • .
    • :nlm-connection
    • ja:dbURL <jdbc:mysql://127.0.0.1:3306/facet>
    • ; ja:dbClass &quot;com.mysql.jdbc.Driver&quot;
    • ; ja:dbType &quot;MySQL&quot;
    • ; ja:dbUser &quot;facet&quot;
    • ; ja:dbPassword “*********&quot;
    Config Example (2)
  • 13.
    • <http://dbpedia.org/sparql> a sources:Endpoint
    • ; sources:defaultGraph &quot;http://dbpedia.org&quot;
    • ; rdfs:label &quot;DBpedia.org&quot;.
    • <http://www.rdfabout.com/sparql> a sources:Endpoint
    • ; rdfs:label &quot;GovTrack.us&quot;.
    Config Example (3)
  • 14. Where It All Goes etcconfig.n3 Describe (and label) models Prefix Mappings
  • 15. Prefix Mappings Quickly add PREFIX statement to query Pre configured vocabularies Add your own…
  • 16. Prefix Mappings :foaf a ja:PrefixMapping ; rdfs:label &quot;FOAF&quot; ; ja:prefix &quot;foaf&quot; ; ja:namespace &quot;http://xmlns.com/foaf/0.1/&quot; .
  • 17. Demonstration (2)
  • 18. … And Yet More ARQ Function & Property Library ARQ Extensions (e.g. COUNT, GROUP BY)
  • 19. Future Plans Documentation! SPARQL Endpoint Access Control Model Caching Syntax Highlighting More Eye Candy Move to Google Code (Your Feature Here)
  • 20. Questions? Twinkle Homepage Annotated Screenshots http://www.slideshare.net/ldodds/twinkle-a-sparql-query-tool/