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Everyday Tools for the Semantic Web Developer

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This talk was given at the London Semantic Web Meetup on September 27th 2011 at SkillsMatter …

This talk was given at the London Semantic Web Meetup on September 27th 2011 at SkillsMatter

The slides give brief notes on the tools but the bulk of the talk was demos, please see http://skillsmatter.com/podcast/home/dotnetrdf/js-2678 for full video of the talk

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  • @nrs90 It isn't something I've ever done personally, take a look at r2rml4net (https://bitbucket.org/r2rml4net/core/wiki/Home) which is a .Net implementation of the W3C R2RML standard and may help get you started
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  • Hey , Could you guide me on how to convert relational table data into rdf using the .net framework
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  • 1. Everyday Tools for the Semantic Web Developer
    Rob Vesse
    rvesse@dotnetrdf.org
    University of Southampton
  • 2. About Me
    Currently writing up my PhD Thesis
    “Link Integrity for the Semantic Web”
    Run the dotNetRDF Project
    Started January 2009
    Current Releases
    0.5.0 Beta (API)
    0.3.0 Alpha (Toolkit)
    27/9/2011
    http://www.dotnetrdf.org
    2
  • 3. My Life as a Semantic Web Developer
    Constantly working with different data sources, formats, vocabularies etc.
    Was frustrated by limited tooling around conversion, query and editing
    Especially the *nix/Java bias of available tooling
    Seemed pointless to keep writing tiny Java/.Net programs to do everyday tasks
    27/9/2011
    http://www.dotnetrdf.org
    3
  • 4. Tools
    All free to use/open source
    All of which I’ve used at one stage or another
    Some of which I use on a daily basis
    Demos
    I’ll demo as many of these I can get through skipping over a few of the lesser used/duplicate tools
    27/9/2011
    http://www.dotnetrdf.org
    4
  • 5. Tools – Data Conversion
    Often you get data in format X but you need it in format Y
    These utilities can convert between formats
    Examples
    rapper
    rdfcopy
    rdfconvert
    27/9/2011
    http://www.dotnetrdf.org
    5
  • 6. rapper
    Part of the Redland family of tooling by Dave Beckett
    http://librdf.org/raptor/rapper.html
    *nix based – needs cygwin on Windows
    Example Usage:
    rapper –g –o turtle input.rdf > output.ttl
    27/9/2011
    http://www.dotnetrdf.org
    6
  • 7. rdfcopy
    Part of the Jena family of tooling
    http://jena.sourceforge.net/javadoc/jena/rdfcopy.html
    Example Usage:
    rdfcopy.bat input.rdf RDF/XML N3 > output.n3
    27/9/2011
    http://www.dotnetrdf.org
    7
  • 8. rdfConvert
    Part of the dotNetRDF Toolkit
    http://www.dotnetrdf.org/content.asp?pageID=rdfConvert
    .Net Based – needs Mono on *nix
    Example Usage:
    rdfConvertinput.rdf –out:output.rj
    Has a rapper compatibility mode:
    rdfConvert –rapper –g –o turtle input.rdf > output.ttl
    27/9/2011
    http://www.dotnetrdf.org
    8
  • 9. Tools - Editing
    There are very few pure text editors for RDF
    Most are over complex and overpowered for just editing a few triples by hand e.gTopBraid Suite, Protege
    Examples
    rdfEditor
    27/9/2011
    http://www.dotnetrdf.org
    9
  • 10. rdfEditor
    Part of the dotNetRDF Toolkit
    http://www.dotnetrdf.org/content.asp?pageID=rdfEditor
    Windows only – Mono does not support the required APIs currently
    Notepad replacement for RDF Editing with syntax highlighting, auto-complete and validation capabilities
    27/9/2011
    http://www.dotnetrdf.org
    10
  • 11. Tools - Query
    You don’t want to have to create a SPARQL endpoint/write code just to test out some simple queries
    Examples
    arq.query
    SparqlGUI
    Twinkle
    27/9/2011
    http://www.dotnetrdf.org
    11
  • 12. arq
    Part of the Jena family of tooling
    http://jena.sourceforge.net/ARQ/cmds.html
    Provides a command line interface to the Jena ARQ query library – probably the most mature and complete SPARQL 1.1 engine available
    Example Usage:
    arq.bat --query query.rq --data data.ttl
    27/9/2011
    http://www.dotnetrdf.org
    12
  • 13. SparqlGUI
    Part of the dotNetRDF Toolkit
    http://www.dotnetrdf.org/content.asp?pageID=SparqlGUI
    .Net Based – needs Mono on *nix
    GUI Interface for quickly testing queries
    27/9/2011
    http://www.dotnetrdf.org
    13
  • 14. Twinkle
    GUI Interface for SPARQL queries built by Leigh Dodds (Talis)
    http://www.ldodds.com/projects/twinkle/
    Note – AFAIK no longer actively developed and used out-dated version of ARQ so doesn’t support SPARQL 1.1 fully
    27/9/2011
    http://www.dotnetrdf.org
    14
  • 15. Tools – Storage and Management
    Most Stores require a lot of setup to use
    For simple prototypes this is overkill
    Most Stores have web based interface or custom client
    No standard user experience
    Custom clients often contain arcane and specialist features that aren’t relevant to average user
    Examples
    Fuseki
    Sesame Windows Client
    Store Manager
    27/9/2011
    http://www.dotnetrdf.org
    15
  • 16. Fuseki
    Part of the family of Jena Tooling
    http://openjena.org/wiki/Fuseki
    Provides a HTTP server for SPARQL Query and Update runnable from the command line
    Can use persistent TDB storage (Jena’s native triple store)
    Example Usage:
    java –jar fuseki-sys.jar --update --loc=DB
    27/9/2011
    http://www.dotnetrdf.org
    16
  • 17. Sesame Windows Client
    Developed by JeenBroekstra and Anton Andreev
    http://sourceforge.net/projects/sesamewinclient/
    .Net Based – needs Mono on *nix
    GUI Interface primarily for Sesame though supports a limited range of other triple stores
    27/9/2011
    http://www.dotnetrdf.org
    17
  • 18. Store Manager
    Part of the dotNetRDF Toolkit
    http://www.dotnetrdf.org/content.asp?pageID=Store%20Manager
    .Net Based – needs Mono on *nix
    GUI for working with a variety of Triple Stores through a standard interface
    27/9/2011
    http://www.dotnetrdf.org
    18
  • 19. Questions?
    rvesse@dotnetrdf.org
    Twitter: @RobVesse