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dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
dotNetRDF - A Semantic Web/RDF Library for .Net Developers
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dotNetRDF - A Semantic Web/RDF Library for .Net Developers

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A quick overview and introduction to the dotNetRDF Project given in the Technical Lightning Talk session at SemTech West 2011 at the Hilton Union Square, San Fransisco

A quick overview and introduction to the dotNetRDF Project given in the Technical Lightning Talk session at SemTech West 2011 at the Hilton Union Square, San Fransisco

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  • Introduce myself and affiliationNote that I intend to go through the slides reasonably fast
  • Lack of existing technology in the .Net space that did what I wantedIn particular 3rd party triple store and SPARQL 1.1 supportWanted library to feel .Net and use latest features
  • Project Started January 2009FOSSNote library runs on .Net and Mono nativelySilverlight/Windows Phone 7 community contribs so not as heavily tested – also cut down
  • Support standard RDF and common extensions to RDF e.g. N3 Graph Literals and VariablesSupports named graphs and quadsKey design aim was to make it feel very .Net and make good use of available features
  • As you can see... (run through the example quickly)
  • Introduce LeviathanMention scalability in-memoryCan be applied to out of memory datasets but currently slower than in-memory (will be modified to address this in future releases)Note support for UpdateNote support for Federated Query ExtensionsNote support for Transactions for Update
  • One of our key aims was always to make it easy to move your data in and out of different Triple storesWe are working on adding more e.g. Dydra
  • We don’t just provide a libraryOur toolkit provides a variety of tools which are useful for day to day non-coding work with RDF e.g. rdfEditorWe eat our own dogfood – any RDF we add to our codebase is almost certainly created and validated using rdfEditor
  • This is a quick overview of a few of the things we’re currently working onMost new features are driven either by user request e.g. Optimiser API in latest release
  • Questions if time
  • Transcript

    • 1. A Semantic Web/RDF Library for .Net Developers
      Rob Vesse
      ECS, University of Southampton
      rvesse@dotnetrdf.org
    • 2. Motivation
      Wanted to be able to code PhD Research projects using a .Net technology stack
      Existing libraries didn’t fit project needs
      Limited choice of 3rd Party Triple Stores
      Lack of latest SPARQL Support i.e. 1.1 features
      Some libraries didn’t really feel like .Net
      i.e. Java style in design, naming conventions etc.
      6/6/2011
      http://www.dotnetrdf.org
      2
    • 3. About the Library
      Completely free and open source
      Triple licensed – pick from GPL, LGPL or MIT depending on your needs
      Written in C# for .Net 3.5 and higher
      Builds for standard .Net, Mono, Silverlightand Windows Phone 7 (latter two are cut down and community contributed)
      6/6/2011
      http://www.dotnetrdf.org
      3
    • 4. Design Overview
      Core RDF Model
      Nodes, Triples, Graphs and Triple Stores
      Extensible at almost every level
      Plug in your own implementations to the API for everything from Graphs to external Triple Stores
      Uses simple and intuitive .Net features
      LINQ to Objects, Properties, Indexers, Extension Methods etc.
      6/6/2011
      http://www.dotnetrdf.org
      4
    • 5. Simple Intuitive Code
      //Load a Graph from a File
      Graphg = newGraph();
      g.LoadFromFile("example.rdf");
      //Print all Triples with a Blank Node Subject
      NTriplesFormatterformatter = newNTriplesFormatter();
      foreach(Triple t in g.Triples)
      {
      if(t.Subject.NodeType == NodeType.Blank)
      {
      Console.WriteLine(t.ToString(formatter));
      }
      }
      6/6/2011
      http://www.dotnetrdf.org
      5
    • 6. Leviathan - A SPARQL 1.1 Engine
      Capable of performing SPARQL queries in-memory on small amounts of data (<=1m Triples)
      Supports both Query and Update including powerful features like:
      Property Paths
      Federated Query Extensions
      Update Transactions
      6/6/2011
      http://www.dotnetrdf.org
      6
    • 7. 3rd Party Triple Store Support
      Supports a range of well known 3rd Party Triple Stores
      AllegroGraph, 4store, Fuseki, Joseki, Sesame, Talis, Stardog and Virtuoso
      Plus generic SPARQL store support
      All accessed by a common interface i.e. easy to switch in and out different storage as needed
      6/6/2011
      http://www.dotnetrdf.org
      7
    • 8. Tooling
      We also provide a Toolkit of useful command line and GUI tools
      Includes utilities like conversion and query
      Includes rdfEditor our Notepad replacement for RDF and SPARQL editing
      Designed to make it possible to get you started experimenting with RDF and SPARQL on Windows without having to code yourself
      6/6/2011
      http://www.dotnetrdf.org
      8
    • 9. Coming Soon
      Improvements and optimisations of our SPARQL Engine
      Full RDFa 1.1 parsing support including RDFa in SVG, XML etc.
      Full SPIN (SPARQL Inferencing Notation) implementation
      Future Plans
      Refresh of our SQL based storage options
      OWL Support
      SPARQL Extensions
      Full Text search
      GeoSPARQL
      6/6/2011
      http://www.dotnetrdf.org
      9
    • 10. Questions?
      Via Email: rvesse@dotnetrdf.org
      Via Twitter: @RobVesse
      Via Website: http://www.dotnetrdf.org
      Via Mailing List: dotnetrdf-support@lists.sf.net
      6/6/2011
      http://www.dotnetrdf.org
      10

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