- From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
- Date: Mon, 04 Feb 2002 13:24:08 -0500
- To: seth@robustai.net
- Cc: www-rdf-logic@w3.org
I'm not sure what all the arguing is about here.
If you read the RDF M&S there are quite clear statements of the status of
reified statements.
A statement and its corresponding reified statement exist
independently in an RDF graph and either may be present without the
other. [RDF M&S, 4.1]
This sentence does not admit multiple reified statements for a single
statement.
RDF M&S is also quite clear that only one statement can exist with the same
subject, predicate, and object.
There is a set called Statements, each element of which is a triple
of the form {pred, sub, obj} [RDF M&S, 5]
Just afterward there is more wording that indicates that a statement can
only have one reification
... we can express the reification of this as a new resource
... [RDF M&S, 5]
So, for any triple there is at most one statement, and for every statement
there is at most one reification.
Peter F. Patel-Schneider
Bell Labs Research
Received on Monday, 4 February 2002 13:25:50 UTC