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A Semantic Web/RDF Library for .Net Developers

A Semantic Web/RDF Library for .Net Developers. Rob Vesse ECS, University of Southampton rvesse@dotnetrdf.org. Motivation. Wanted to be able to code PhD Research projects using a .Net technology stack E xisting libraries didn’t fit project needs

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A Semantic Web/RDF Library for .Net Developers

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  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. http://www.dotnetrdf.org

  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) http://www.dotnetrdf.org

  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. http://www.dotnetrdf.org

  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)); } } http://www.dotnetrdf.org

  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 http://www.dotnetrdf.org

  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 http://www.dotnetrdf.org

  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 http://www.dotnetrdf.org

  9. Coming Soon Future Plans Refresh of our SQL based storage options OWL Support SPARQL Extensions Full Text search GeoSPARQL • 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 http://www.dotnetrdf.org

  10. Questions? Via Email: rvesse@dotnetrdf.org Via Twitter: @RobVesse Via Website: http://www.dotnetrdf.org Via Mailing List: dotnetrdf-support@lists.sf.net http://www.dotnetrdf.org

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