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IPTC Semantic Web November 2010

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IPTC is exploring the use of Semantic Web for the news industry. ...

IPTC is exploring the use of Semantic Web for the news industry.

This is the report I gave to the IPTC's 2010 November meeting in Rome. We are working on creating Linked Data (using SKOS), exploring the use of metadata in HTML (using RDFa and microformats) and creating a news ontology based on NewsML-G2 (using OWL).

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IPTC Semantic Web November 2010 IPTC Semantic Web November 2010 Presentation Transcript

  • IPTC and The Semantic Web
    Stuart Myles
    Associated Press
    3rd November 2010
  • IPTC’s Semantic Web Agenda
    • IPTC news codes and media codes as Linked Data
    • Metadata in HTML
    • RDFa and microformats for news
    • A news ontology
    Both Upper Case and lower case semweb
    © 2010 IPTC (www.iptc.org) All rights reserved
    2
  • Semantic Web and Linked Data
    http://bnode.org/media/2009/07/08/semantic_web_technology_stack.png
  • IPTC Linked Data
    Turn IPTC subject codes into Linked Data
    Connect related data across the web using URIs, HTTP & RDF
    A set of principles from Tim Berners Lee http://www.w3.org/DesignIssues/LinkedData.html
    Use URIs as names for things
    Use HTTP URIs so that people can look up those names.
    When someone looks up a URI, provide useful information, using the standards (RDF, SPARQL)
    Include links to other URIs, so that they can discover more things
    Apply the principles to IPTC’s subject codes
    Already published as XML (G2 Knowledge Items)
    And as HTML
    The plan: convert XML into RDF, using SKOS and DC
    © 2010 IPTC (www.iptc.org) All rights reserved
    4
  • TLAs and FLAs:AKA RDF? SKOS? DC?
    RDF is a single model - Subject Predicate Object
    With multiple syntaxes
    We selected RDF/XML and RDF/Turtle
    And multiple “vocabularies”
    Such as SKOS, Dublin Core
    SKOS = Simple Knowledge Organization System
    http://www.w3.org/2004/02/skos/
    Designed for representing thesauri and classification schemes
    The Semantic Web “way” is
    Use existing vocabularies as much as possible
    When you invent a new term, link it to existing terms
    We decided to use SKOS and DC as the main vocabs
    © 2010 IPTC (www.iptc.org) All rights reserved
    5
  • Mapping IPTC Codes to RDF
    In general, IPTC KnowledgeItems map well to RDF
    SKOS concepts
    Dublin Core properties
    Certain KI properties don’t have a direct mapping
    Created and updated timestamps of KnowledgeItem properties
    Difficult to determine more advanced mappings
    SKOS wiki had some documentation
    http://esw.w3.org/SkosCoreGuideToc/SectionVersioning
    SKOS email list seems dormant
    SemanticOverflow a great way to get questions answered
    http://www.semanticoverflow.com/questions/902/adding-created-modified-properties-to-skos-do-i-need-to-reify
    © 2010 IPTC (www.iptc.org) All rights reserved
    6
  • Linking from IPTC Codes to Other Schemes
    “Include links to other URIs, so that they can discover more things”
    Linking is the heart of linked data
    But linking is more like mapping
    owl:sameas seems to have unintended consequences
    SKOS’s mapping properties offer a range of options
    closeMatch, exactMatch, broadMatch, narrowMatch, relatedMatch
    http://www.w3.org/TR/skos-reference/#mapping
    We decided to map the 17 top level IPTC subject codes to DBPedia
    Some top level terms are really “umbrella” terms – difficult to map to a single equivalent
    © 2010 IPTC (www.iptc.org) All rights reserved
    7
  • IPTC Linked Data
    Demonstration of the Linked Data versions of IPTC News Codes
    Discussion of Proposed IPTC/MINDS Linked Data project
    © 2010 IPTC (www.iptc.org) All rights reserved
    8
  • IPTC and Linked Data:Next Steps
    Request a more complete Linked Data mapping of IPTC Subject Codes and Media Topics
    Reach out to the broader Semantic Web and news communities for feedback and collaboration
    Participate with MINDS on the potential of Linked Data for the news business
    © 2010 IPTC (www.iptc.org) All rights reserved
    9