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Re: owl:Ontology in abstract syntax

From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
Date: Tue, 31 Dec 2002 08:18:14 -0500 (EST)
Message-Id: <20021231.081814.74183438.pfps@research.bell-labs.com>
To: jjc@hpl.hp.com
Cc: www-webont-wg@w3.org

From: Jeremy Carroll <jjc@hpl.hp.com>
Subject: Re: owl:Ontology in abstract syntax
Date: Thu, 19 Dec 2002 14:49:51 +0100


> I note there are still a few bugs:
> e.g. no rule for empty sequences (main node is rdf:nil).


> I think the Class rule should be split into three cases:
> - partial with no descriptions
> - with one description
> - with two or more descriptions

Done. No descriptions are also allowed.


> I think the use of both annotation and Annotation as two distinct syntactic
> constructs is poor naming - how about "OntologyAnotation" and "annotation"?

Not done.

> The abstract syntax should require at least one description in complete
> Class constructs.

Not done.  It is a bit silly to define a synonym for owl:Thing in this way,
but why forbid it?

> The cardinality rules currently require the use of xsd:decimal in owl Lite
> and OWL DL. It might be better to:
>   a) use xsd:nonNegativeInteger


>   b) explicitly permit any type derived by restriction from xsd:decimal as
> long as the value is in the value space of xsd:nonNegativeInteger

Done (in today's changes).  This is a special case, but it does appear to
be benign.


Received on Tuesday, 31 December 2002 08:18:28 UTC

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