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SCHEMAS Forum for Metadata Schema Implementers

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Co-operation between standards. DCMI and IEEE/Learning Object Metadata. ONIX and EBX ... What are the main challenges and opportunities in cross-standard co-operation? ... – PowerPoint PPT presentation

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Title: SCHEMAS Forum for Metadata Schema Implementers


1
SCHEMASForum for Metadata Schema Implementers
  • Interoperability across metadata standards
  • SCHEMAS Workshop, The Hague, 30 November 2001
  • Makx Dekkers, mail_at_makxdekkers.com

2
The situation
  • Many metadata standardisation activities (see
    SCHEMAS Standards Framework Reports)
  • Various models being used (from very simple to
    very elaborate)
  • Overlap between domains becoming visible
  • Implementers are confused

3
Possible futures
  • Many insular standards
  • Re-inventing the wheels
  • Private solutions
  • which means expensive implementation
  • or
  • Increased interoperability
  • Aligning of models
  • Application Profiles
  • which supports the Semantic Web

4
The Semantic Web
  • A vision of possibilities
  • The Semantic Web is an extension of the current
    web in which information is given well-defined
    meaning, better enabling computers and people to
    work in cooperation.
  • -- Tim Berners-Lee, James Hendler and Ora
    Lassila, The Semantic Web, Scientific American,
    May 2001

5
Semantic Web aspects
  • Machines talking to machines semantics need to
    be unambiguously declared
  • Federating domains enabling complex tasks based
    on information from various sources
  • Wide scope from home to global
  • Robust imperfect understanding

This is not going to be easily achieved
6
Semantic Web is based on
  • Conventions about declaring and relating
    semantics
  • Conventions about infrastructure (e.g.
    registries)
  • The Web for connectivity
  • A whole lot of machinery to be developed
  • Integration of legacy solutions at affordable
    cost

7
Semantic Web issues
  • From vision to implementation how can decision
    makers be convinced?
  • Leadership everyone is waiting for the Semantic
    Web Activity at W3C to finalise specifications
    and support tools
  • Understanding how can we begin to create common
    directions?

8
What is needed?
  • Understanding
  • Cross-domain co-operation
  • Building bridges between communities
  • Implementation
  • Demonstration of practical implementation of the
    base technologies
  • Guidance and best practice

9
Creating understanding
  • Need to acknowledge that standards need to
    co-operate in the Semantic Web
  • Strategic approaches
  • Mapping between standards bottom-up, model
    incompatibilities, loss of information
  • Mixing and matching the SCHEMAS approach,
    Application Profiles
  • Harmonisation and integration top-down

10
Expressing semantics
  • Using the RDF approach to declare semantics and
    relationships modular metadata
  • Interoperability between contolled vocabularies
    and ontologies
  • Expressing relations between concepts in
    different standards top-level concept list, e.g.
    Basic Semantics Register, Topic Maps

11
What is happening?
  • Cross-domain activities
  • The Dublin Core Metadata Initiative
  • Co-operation between standards
  • DCMI and IEEE/Learning Object Metadata
  • ONIX and EBX
  • OASIS and ebXML
  • More to come
  • OASIS Registries meeting in December bringing
    together XML-based standards

12
SCHEMAS and beyond

Identify and annotate activities Register core
vocabularies and profiles Best-practice and
guidance material Awareness and dissemination

Help develop core profiles Bring together
metadata activities Maintain and enhance registry
13
SCHEMASForum for Metadata Schema Implementers
  • Interoperability across metadata standards
  • SCHEMAS Workshop, The Hague, 30 November 2001
  • Makx Dekkers, mail_at_makxdekkers.com

14
Panel participants
  • Tony Hegarty, PwC - business
  • Rachel Heery, UKOLN - academic
  • Thomas Baker, FHG - digital libraries research
  • Michael Day, UKOLN - cultural heritage

15
Panel questions
  • What is the importance of the Semantic Web vision
    (general, domain, own work)?
  • What are the main challenges and opportunities in
    cross-standard co-operation?
  • What are the main technical challenges and what
    do we need from the W3C?
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