W3C home > Mailing lists > Public > public-owl-wg@w3.org > June 2008

I've extended the specification with easy keys (ACTION-160)

From: Boris Motik <boris.motik@comlab.ox.ac.uk>
Date: Mon, 16 Jun 2008 21:14:31 +0100
To: <public-owl-wg@w3.org>
Message-ID: <003b01c8cfed$96a5dbb0$6c12a8c0@wolf>


As required by my ACTION-160, I've extended the specification with keys. Here are the diffs:

Structural specification:


RDF Mapping:

XML Schema:


This was one of the more complex changes to the documents, so it is quite possible that there are bugs out there. Should you find
any, please let me know.

Just as a heads up, contrary to Bijan's suggestion, I haven't introduced a nonterminal production KeyPropertyExpression that would
be a superclass for ObjectPropertyExpression and DataPropertyExpression. Introducing another class seemed like quite a bit of
overhead, particularly that you need to syntactically distinguish object from data property expressions in the semantics and in
various other places. Instead, in the RDF mapping and semantics document, I chose to refer to the axiom as KeyFor( OPE1 ... OPEm
DPE1 ... DPEm CE ). Although this seems to suggest that all object properties should come before all data properties, this is not
the intended meaning; in fact, the syntax allows for interleaving object and data properties.


Received on Monday, 16 June 2008 20:16:05 UTC

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