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Re: oa:equivalent not yet in core-schema.xml

From: Robert Sanderson <azaroth42@gmail.com>
Date: Tue, 7 Aug 2012 13:33:14 -0600
Message-ID: <CABevsUHM5Jp+n5AgkJR6Ab3UN1SoLVVHuxBxWTxM5LxHBYyZfA@mail.gmail.com>
To: Bob Morris <morris.bob@gmail.com>
Cc: public-openannotation <public-openannotation@w3.org>
It's listed but indeed not modeled:

<rdf:Property rdf:about="http://www.w3.org/ns/openannotation/core/equivalent">
<rdfs:comment>The subject and object resources of the oa:equivalent
relationship represent the same resource, but potentially have
different metadata such as generator, generated and serialization
format. oa:equivalent is a symmetrical relationship; if A
oa:equivalent B, then it is also true that B oa:equivalent A.
</rdfs:comment>
<rdfs:isDefinedBy rdf:resource="http://www.w3.org/ns/openannotation/core/"/>
<rdfs:label>equivalent</rdfs:label>
</rdf:Property>

I'm not sure *how* it would be modeled though.

A suggestion was raised to get rid of equivalent and recommend either
skos:exactMatch or skos:closeMatch.  How do people feel about these
three options?

Rob




On Tue, Aug 7, 2012 at 1:22 PM, Bob Morris <morris.bob@gmail.com> wrote:
> As far as I can tell, oa:equivalent is not modeled in
> http://www.openannotation.org/spec/core/core-schema.xml as of this
> date.
>
> I suppose this will fall in Stian's volunteer effort, because  the
> formal semantics of "The subject and object resources of the
> oa:equivalent relationship represent the same Annotation"  will
> require  some notion of "same" for instances, e.g. owl:sameAs.   At
> the moment, it is unclear to me how one can specify formal semantics
> that would restrict oa:equivalent to its intended use, i.e. where
> Target and Body have identical URIs, which is what Figure 2.4 of the
> core spec seems to be suggesting.
>
>
> Robert A. Morris
>
> Emeritus Professor  of Computer Science
> UMASS-Boston
> 100 Morrissey Blvd
> Boston, MA 02125-3390
>
> IT Staff
> Filtered Push Project
> Harvard University Herbaria
> Harvard University
>
> email: morris.bob@gmail.com
> web: http://efg.cs.umb.edu/
> web: http://etaxonomy.org/mw/FilteredPush
> http://www.cs.umb.edu/~ram
> ===
> The content of this communication is made entirely on my
> own behalf and in no way should be deemed to express
> official positions of The University of Massachusetts at Boston or
> Harvard University.
Received on Tuesday, 7 August 2012 19:33:42 GMT

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