>>>>> "BP" == Bijan Parsia <[EMAIL PROTECTED]> writes:
EJ> Reification?
>>
>> That's who, not why.
BP> No, you can do both with reification.
Well, you can do anything with anything:-)
>> The Gene Ontologies evidence codes are and references are much
>> closer.
>>
>> Also, I am not sure of the semantics of reification.
BP> RDF reification has very little to no built in semantics. What
BP> it provides is a standardized syntax.
Ok. I presume it provided a standardised syntax for something, at
least implied.
Does it mean, then, when a triple is reified that the triple is in
some way associated with this other resource?
The association is done by the reification using a URI which is
intended to identify the triple. However, there is no 'standard' way
to associate a URI with an RDF triple. This is exactly the problem
that named graphs were proposed as a way to solve. The other is that
one rarely wants to assign properties like belief and provenance to a
single triple; and saying that you believe/are responsible for a
graph, and saying that you believe/are responsible for every triple
in the graph, might well not be exactly equivalent. Since one can
always treat a single triple as a very small graph when needed, the
graph seems to be the best 'unit' to choose.
BP> However, all this *supports* your point. There *IS* no
BP> standardized way to represent this sort of information. There
BP> is a more or less standard (and widely loathed) hook/technique
BP> upon which you could build a standard mechanism for representing
BP> this sort of information.
Yeah, thats my feeling. Reification is a start for doing this, and
might provide a underpinning.
I really would suggest the named graphs would be a better
underpinning. Unlike reification, they do have a full semantics and a
clear deployment model, and they follow in a long tradition of naming
document-like semantic entities. And unlike RDF reification, they are
not widely loathed, and they are fairly widely supported.
Pat
Phil
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