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UKOLN is supported by:

NISO MI TG2: Identifiers for Metadata Terms in DC CD AP NISO MI Meeting, Research Triangle Park, NC, USA Wednesday 23 March 2005 – Thursday 24 March 2005 Pete Johnston Research Officer, UKOLN. UKOLN is supported by:. www.bath.ac.uk. Assigning URIs for metadata terms.

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UKOLN is supported by:

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  1. NISO MI TG2: Identifiers for Metadata Terms in DC CD AP NISO MI Meeting, Research Triangle Park, NC, USA Wednesday 23 March 2005 – Thursday 24 March 2005 Pete Johnston Research Officer, UKOLN UKOLN is supported by: www.bath.ac.uk

  2. Assigning URIs for metadata terms • Must be globally unique • Must be relatively persistent • Should not be (re-)assigned to identify another resource • “Expected to last as long as the Internet” • Social/organisational, rather than technical, issue • W3C, DCMI make public policy commitment to URI persistence • Should be resolvable to machine-readable or human-readable representation • using widely deployed technologies • use of HTTP URIs by Semantic Web developers • Should be easily usable in RDF/XML and DC-XML • Need naming authority

  3. Maintaining metadata terms • For use in DC metadata, must be defined in manner compatible with DCMI Abstract Model / RDF • Terms as conceptual resources • URI should continue to denote same “essential concept” over time • But terms evolve with use • Term definitions/descriptions require maintenance • Amendment/correction • Additional information • Description of relationships with other terms • Need (“DC-aware”) maintenance authority

  4. Terms v DCAPs • N.B. Maintenance of terms is distinct from maintenance of DCAP • DCAP may reference terms from multiple sources • Terms maintained by multiple authorities (e.g. DCMI, LoC, ….) • Owner/maintainer of DCAP not necessarily owner/maintainer of terms referenced in DCAP

  5. NISO MI TG2: Identifiers for Metadata Terms in DC CD AP NISO MI Meeting, Research Triangle Park, NC, USA Wednesday 23 March 2005 – Thursday 24 March 2005 Pete Johnston Research Officer, UKOLN UKOLN is supported by: www.bath.ac.uk

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