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annotations was Re: MINUES: Teleconference 30 Jan 2003

From: Jeremy Carroll <jjc@hpl.hp.com>
Date: Fri, 31 Jan 2003 21:45:12 +0100
To: www-webont-wg@w3.org
Message-Id: <200301312145.12424.jjc@hpl.hp.com>


Peter wrote:
> Solutions:

> 1/ Do nothing.
... and reopen 5.3 Semantic Layering 

since it was closed "provided 2 technical pieces of work can be completed"
http://www.w3.org/2001/sw/WebOnt/webont-issues.html#I5.3-Semantic-Layering

one of those being the correspondence theorem which is flawed in its premises 
(that annotations can be ignored)

The theorem statement does not mention annotations
http://www-db.research.bell-labs.com/user/pfps/owl/semantics/rdfs.html#theorem-1
[[
 Let T be the mapping from OWL ontologies in the abstract syntax to RDF 
graphs. Let V' = VI + VC + VD + VOP + VDP be a separated OWL vocabulary. Let 
K and Q be OWL abstract syntax ontologies with separated names over V' and 
let V = V' ∪ VRDFS ∪ VOWL. Then it is the case that K entails Q if and only 
if T(K) OWL DL entails T(Q). 
]]
Q including an annotation not in K provides a counterexample.

> 2/ Change the semantics document a whole lot.  This may take a while.
>
>    Several components to handle annotations would have to be added to
>    the direct semantics interpretations, and incorporated into the
>    semantic rules.  The correspondence proof would have to be
>   overhauled as well.  I think that this can be done, but it is
>   significant work.

... I have already proposed a small inelegant fix [1], which you have sneered 
at. I would value having my proposal demolished.

Also, the correspondence proof needs to be overhauled. (see [2]), so that is 
no new work.

> 3/ Remove annotations from the triple syntax for OWL DL and OWL Lite.
>    This would be easy.

... and edit out requirements document to exclude all annotations and things 
needing annotations .... and get that through the W3C consensus process (not 
just within but also outside the WG).

Jeremy

[1] section headed: "OWL Lite/DL Entailment" in
 http://lists.w3.org/Archives/Public/www-webont-wg/2003Jan/0523.html

[2]
http://lists.w3.org/Archives/Public/www-webont-wg/2003Jan/0424.html
Received on Friday, 31 January 2003 15:44:27 GMT

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