The Knowledge Management Research Group 1 Towards an Interoperability Framework for Metadata Standards Presenter: Mikael Nilsson Co-authors: Pete Johnston.

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Presentation transcript:

The Knowledge Management Research Group 1 Towards an Interoperability Framework for Metadata Standards Presenter: Mikael Nilsson Co-authors: Pete Johnston Ambjörn Naeve Andy Powell

The Knowledge Management Research Group 2 Interoperability for DC metadata Reusing existing properties...  in new application profiles  in new syntaxes Adding new properties to...  existing application profiles  existing syntaxes Introducing new values to existing properties Expressing existing APs in new syntaxes

The Knowledge Management Research Group 3 Abstract information flow Metadata terms Application profiles Metadata syntax Interoperable interpreter are used in are encoded using transfer usage Abstract Model Metadata syntax Ad-hoc Interpreter transfer

The Knowledge Management Research Group 4 The Dublin Core Framework

The Knowledge Management Research Group 5 DCMI Abstract Model Refined and formalized version of the “DCMI Grammatical Principles” Abstract Model Vocabularies/profiles Instance metadata uses defined using  Defines the core constructs used in DC metadata: properties, vocabulary encoding schemes, etc...  Basis for defining vocabularies, profiles and syntaxes

The Knowledge Management Research Group 6 Vocabulary Model (elements) Example:

The Knowledge Management Research Group 7 Vocabulary Model (values) No real consensus on how to describe value vocabularies. Value vocabularies come in many kinds  simple lists  thesauri  taxonomies  ontologies  etc. SKOS?

The Knowledge Management Research Group 8 Profile Model Example: CEN/ISSS CWA 14855

The Knowledge Management Research Group 9 Where we are (DC family)

The Knowledge Management Research Group 10 Where others are (IEEE LOM family)

The Knowledge Management Research Group 11 Where others are (RDF family)

The Knowledge Management Research Group 12 Cross-framework interoperability How about interoperability between  DC IEEE LOM RDF MPEG-7 etc.? All follow the same basic pattern BUT – very different abstract models In general: cross-framework is hard DC RDF works – as models are intentionally compatible See also “ The Future of Learning Object Metadata Interoperability”, in Koohang A. (ed.) Learning Objects: Standards, Metadata, Repositories, and LCMS, in press.

The Knowledge Management Research Group 13 Terminology Stop using “metadata standard” or “schema” Start using either  abstract model  metadata format/syntax  metadata vocabulary  application profile “What kind of specification am I trying to produce?”  Most: application profile (+ some vocabulary)

The Knowledge Management Research Group 14 Take home message Formalized models (DCAM, vocabs, profiles) pave the way for interoperable processing A clear framework helps us fill in the blanks Much progress over the last year! See DC- ARCH... The word ”schemas” is overused...