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Reification thing questions (was: Re: reification test case)

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Mon, 4 Feb 2002 19:58:20 -0600
Message-Id: <p05101417b884e650e442@[65.212.118.208]>
To: Brian McBride <bwm@hplb.hpl.hp.com>
Cc: w3c-rdfcore-wg@w3.org
Further to my last message, let me suggest some key questions to ask 
about the things that a reification is supposed to describe, ie what 
_:x is intended to denote when we write

_:x  <rdf:type>      <rdf:Statement> .
_:x <rdf:subject>   <subject> .
_:x <rdf:predicate> <predicate> .
_:x  <rdf:object>    <object> .

1.  Does it make sense to say that _:x has properties like date it 
was asserted, who wrote it, where it was imported from? (If not, just 
to be awkward, what if someone actually asserts such properties of 
_:x? Does something complain, or is that just a kind of 
inconsistency?)

2.  If there is only one of these things, where is it? Does that 
question make sense? If not, what kinds of question would make sense 
applied to the thing?

3. Can the thing be located in an RDF graph? If so, and if that graph 
is in a document (with a URI), is the  thing in the document? (Could 
it be accessed via the URI?) If the document is copied, is the thing 
in the graph also copied? If so, is the copy of it other thing or is 
it the same thing? If another, does it also satisfy the description 
in the reification above?

Pat


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Received on Monday, 4 February 2002 22:40:03 EST

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