Update on work of Joint DCMI/IEEE LTSC Task Force
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Transcript of Update on work of Joint DCMI/IEEE LTSC Task Force
16
Ap
ril 20
07
Pete Johnston, Eduserv [email protected]
www.eduserv.org.uk/foundation
Update on work of Joint DCMI/IEEE LTSC Task Force
JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
2
Abstract Models & Application Profiles
• Implementers want to use component parts of different metadata standards in combination
• Both DC and LOM have notions of “metadata application profile”…
• … but based on different Abstract Models• DC Application Profile
– how to use a set of identified properties, vocabulary encoding schemes, syntax encoding schemes to construct a DC metadata description set
• LOM Application Profile– how to use a set of identified LOM data elements,
datatypes, vocabularies to construct a LOM instance• LOM data elements and DC properties/classes can not
be used in combination in same information structure
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
3
The proposed solution
• Develop a LOM-DCAM mapping– “LOM data elements” => “instances of DCAM
components/constructs” – Interpretation of LOM semantics in terms of DCAM
• Not a binding for LOM, but a translation – lossy in part– one-way translation
• Approach– conceptualise LOM as Entity-Relationship model
• build on earlier work for LOM RDF binding
– represent E-R model in terms of DCAM constructs– specify required terms, assign URIs
LOM Conceptual Data Schema
Dublin Core Abstract Model
DC-RDF Instance
DC-XML Instance
conforms to conforms to
bound to
translate(lossy)
bound to
LOMInstance
DC DescriptionSet
LOM-XMLInstance
DC DescriptionSet
CombinedDC DescriptionSet
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
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Outcomes
• View of LOM as a basic DC Application Profile• Availability of set of “LOM terms” which are
usable in other DCAPs• Availability of RDF binding of LOM “for free”
via DC RDF binding (mapping)• Separation of LOM-DCAM translation from
RDF binding• Collaboration between communities• Contribution towards better alignment of DC
and LOM abstract models?
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
6
Joint DCMI/IEEE LTSC Task Force
• Initiated at DC2005 in Madrid, Sep 2005
• Reports to DC Education Community & IEEE LTSC
• Chairs: Mikael Nilsson & Jon Mason
• Participation open to all: – mailing list (~20 subscribers), Wiki
• Joint: – Collaborative work on drafts
– Joint consensus
– Co-publishing of results
• Aim: an IEEE “Recommended Practice” and a DCMI “Recommendation”
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
7
Joint DCMI/IEEE LTSC Task Force
• Charter approved by DCMI Advisory Board and IEEE LTSC SEC
• Three initial outputs available for discussion:1. Draft of LOM-DCAM mapping
– includes description of DCAP
2. Example instance based on mapping– LOM XML – DC Text
3. Draft of required property/class/VES definitions• Currently awaiting
– revisions to DCAM– revisions to definitions of DCMI terms
• Recent activity within ProLearn project– Virtual seminars on Learning Objects, Metadata and
Interoperability
16 April 2007JISC CETIS Metadata & Digital Repositories SIG meeting, Manchester
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Joint DCMI/IEEE LTSC Task Force
Joint DCMI/IEEE LTSC Task Force
http://dublincore.org/educationwiki/DCMIIEEELTSCTaskforce
ProLearn: Network of Excellence
http://www.prolearn-project.org/
(esp Research Work Package 4)
16
Ap
ril 20
07
Pete Johnston, Eduserv [email protected]
www.eduserv.org.uk/foundation
Update on work of Joint DCMI/IEEE LTSC Task Force
CETIS Metadata & Digital Repositories SIG, UKOLN, Bath