- From: Ralph R. Swick <swick@w3.org>
- Date: Fri, 25 Sep 1998 14:25:06 -0400
- To: John Cowan <cowan@locke.ccil.org>
- Cc: www-rdf-comments@w3.org
(Ora Lassila previously replied privately to John; this message
is primarily to include the response in the public archive.)
At 04:23 PM 9/10/98 -0400, John Cowan wrote:
>The draft does not make clear whether an explicitly written reified
>statement (i.e. a resource with the four properties instanceOf,
>propName, propObj, and value) is necessarily asserted by RDF.
The statement and the reified statement are independent; either
can exist in the model instance without the other and they are
not interchangable. The fact asserted by a statement is part
of the model if and only if the statement is in the model.
>In formal terms, can we infer from the presence in the set Triples of:
>
> {instanceOf, [x], RDF:Property}
> {propName, [x], p}
> {propObj, [x], r}
> {value, [x], v}
>
>that {p, r, v} is also present in Triples?
no, this is not a valid inference in RDF.
> If not, this should be
>clarified.
We will add more words to this effect.
Thank you for your suggestions.
-Ralph R. Swick
W3C/MIT
Received on Friday, 25 September 1998 14:28:31 UTC