This is a bit tricky because the common usage of the terms "resource" and "literal" has diverged from the strict definitions in RDFS.
Everything described in RDF is an rdfs:Resource (see
section 2.1). rdfs:Literal is thus a subclass of rdfs:Resource (see https://www.w3.org/TR/rdf-schema/#ch_literal
2.3), so literals are also resources. However, in common usage "resource" is often used for URI resources and blank nodes (which are more unambiguously referred to as "entities" or "objects"), and opposed to literals such as strings, integers, dates, etc.
The range of rdf:value is rdfs:Resource, so the object can be any type of resource: a URI resource, a blank node, or a literal. This is why rdf:value can be used for structured data, as opposed
to rdfs:label, whose range is rdfs:Literal.
OWL distinguishes owl:ObjectProperty, which takes an entity as an object – i.e., URI resources and blank nodes — and owl:DatatypeProperty, which takes an rdfs:Literal or an XSD datatype as an object.
Unlike RDF properties, every OWL property is defined as one or the other. So in OWL terms, rdf:value is neither an ObjectProperty nor a DatatypeProperty. This may relate to Simon's first point regarding the Bibframe convention of distinguishing object and
Based on the above, rdfs:label would seem to be the preferred predicate in the examples cited below.
However, in certain of these cases it might be possible and more useful to define a controlled vocabulary of named individuals to serve as objects. As a hypothetical example, if there is a limited
set of possible AccessPolicy values, we could have:
ex1:itemZ bf:usageAndAccessPolicy ex2:policyUnrestricted .
ex2:policyUnrestricted a bf:AccessPolicy ;
rdfs:label "unrestricted" .
Semantic Web Developer
Cornell University Library
Bibliographic Framework Transition Initiative Forum on behalf of Tom Johnson
Bibliographic Framework Transition Initiative Forum
Tuesday, June 21, 2016 at 10:31 AM
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Re: [BIBFRAME] rdf:value
It's probably not a good idea to use rdf:value with bibframe, as the bibframe RDF
convention is to use separate properties for object and data values.
Can you say more about this Simon? Does rdf:value have special meaning w.r.t. owl:ObjectProperty/DataProperty that I'm not aware of?