Presentation on theme: "Source, Relation, Identifier. Topics zDefinitions need attention zPresentation in RDF zIs Source a type of Relation? zWhat is actually identified yActual."— Presentation transcript:
Source, Relation, Identifier
Topics zDefinitions need attention zPresentation in RDF zIs Source a type of Relation? zWhat is actually identified yActual resource yRepresentation/presentation zHow identify non-electronic resources?
Topics zLabel for Relation type yCaptions zTransforming data DC to MARC/MARC to DC difficult, especially for source zDoes DC support nested descriptions f related resources? zIdentifiers vs. locators; what should go in the Identifier element?
Topics zHow is the availability of a resource made known? zHow should issues of versioning be handled? zWhat is the status of the Relation types? zTerminology yWork, expression, manifestation, item
Topics zDefinition of Relation
Identifier in RDF Description about dc:Identifier resource.html
Identifier in RDF zIf expressed in RDF, dc:Identifier need not be repeated.
Dumb-down Rule zFollow the RDF Value arcs to get a string. zThere is a limit to how dumb you can get. yJuhas Law zThere is a limit to how smart you could get. yOles Corollary
Problems with Relation zCurrent RFC definition requires two components yIdentifier yExpression of relation zHow expressed in unqualified DC? zWhat are dumb-down rules for qualified DC?
Options zFix the definition zInline coding IsBasedOn zRethink the data model zRequire smarter parsing and dumb-down rules
Proposal zModify definition for unqualified DC 1.1 as follows: Relation A standard identifier or free-text string identifying a related resource
Is Source a type of Relation? zYes zIn effect, a particular qualifier, IsSourceFor, has been merged with the Relation element to create the Source element.
Source zDesirable functions yPoint to a related resource yExpress a relationship yProvide metadata for or a pointer to metadata for the related resource
Source: Preliminary Thoughts zLeave Source in unqualified DC zIn qualified DC, state that Source is a Relation with appropriate qualifier zBeing a relation, its values are the same as those allowed for relations. (proposed to be an identifier or free text). zRevise definition zMore work needed...