Pete Johnston, Eduserv Foundation [email protected] 16 April 2007 Update on work of...

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

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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


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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


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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?


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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”


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• 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


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http://dublincore.org/educationwiki/DCMIIEEELTSCTaskforce

ProLearn: Network of Excellence

http://www.prolearn-project.org/

(esp Research Work Package 4)

http://dublincore.org/educationwiki/DCMIIEEELTSCTaskforce

http://www.prolearn-project.org/

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

Pete Johnston, Eduserv Foundation [email protected] 16 April 2007 Update on work of...

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