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Re: RDF features in OWL 2

From: Alan Ruttenberg <alanruttenberg@gmail.com>
Date: Tue, 4 Nov 2008 15:50:53 -0500
Message-ID: <29af5e2d0811041250k7bfcba06n90dae3a8caebed43@mail.gmail.com>
To: "Michael Schneider" <schneid@fzi.de>
Cc: "W3C OWL Working Group" <public-owl-wg@w3.org>

Before we had rdf importing, if we were to allow the rdf vocabulary we
might have thought it necessary to decide what sort of properties the
various rdf properties were. We could now, instead, simply allow their
use in owl:imported rdf documents as long as the importing document
declares their type.

That annotations are on "URI"s also makes the question of what type
they are less acute - the annotations will be valid regardless of how
they are typed.

A specific example might be the use of some of rdf reification
vocabulary in a certain ontology by declaring rdf:subject, object, and
predicate to be object properties.

-Alan

On Tue, Nov 4, 2008 at 3:25 PM, Michael Schneider <schneid@fzi.de> wrote:
> Hi Alan!
>
> Alan Ruttenberg wrote:
>
>>I am wondering about whether it is wise to consider these disallowed
>>in OWL 2 DL, and hence making any RDF that uses them unusable in OWL
>>DL.
>>
>>In the light of our resolution of issues 137 and 114, should use of
>>these vocabulary terms be allowed as long as there is sufficient
>>additional OWL declarations to make them usable in OWL DL?
>>
>>-Alan
>
> For my interest: What do you exactly mean by this? In particular, I do not
> understand how 114 and 137 come into play here.
>
> Michael
>
>>On Mon, Nov 3, 2008 at 2:22 PM, Elisa F. Kendall <ekendall@sandsoft.com>
>>wrote:
>>> Thanks, Michael --
>>>
>>> That was our preliminary conclusion, but we wanted to confirm one last
>>time,
>>> "just to make sure" :).
>>>
>>> Best,
>>>
>>> Elisa
>>>
>>>
>>> Michael Schneider wrote:
>>>
>>> Hi!
>>>
>>> I think Jie's question can easily be answered. Have a look in Section
>>2.3 of
>>> the Specification:
>>>
>>>   <http://www.w3.org/2007/OWL/wiki/Syntax#URIs_and_Namespaces>
>>>
>>> All the URIs asked for have an "rdf" namespace prefix, so they are
>>reserved
>>> according to Table 2. And none of these URIs appear in Table 3
>>("Reserved
>>> Vocabulary with Special Treatment"). So the answer is "not supported
>>in OWL
>>> 2 DL" to all these URIs.
>>>
>>> The related (now closed) issue is ISSUE-104 ("dissallowed
>>vocabulary").
>>>
>>> Further, there is no (explicit semantic) relationship between the
>>original
>>> RDF Reification ("rdf:Statement") and the new annotation-reification
>>> ("owl:Axiom") vocabulary. We have introduced the latter as a
>>resolution for
>>> ISSUE-67 ("reification for axiom annotation").
>>>
>>> Michael
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: public-owl-wg-request@w3.org [mailto:public-owl-wg-
>>request@w3.org]
>>> On Behalf Of Ian Horrocks
>>> Sent: Monday, November 03, 2008 2:24 PM
>>> To: Jie Bao
>>> Cc: W3C OWL Working Group
>>> Subject: Re: RDF features in OWL 2
>>>
>>>
>>> Sorry for the slow reply -- still catching up after the F2F and ISWC.
>>>
>>> Speaking for myself, I don't see any point in including these
>>> features in the QR.
>>>
>>> Ian
>>>
>>>
>>> On 23 Oct 2008, at 01:12, Jie Bao wrote:
>>>
>>>
>>>
>>> Hi All
>>>
>>> I'm not quite sure whether the following RDF features are still
>>> supported in OWL 2
>>>
>>> * complex values using rdf:value, e.g.
>>> http://www.w3.org/TR/2004/REC-rdf-primer-20040210/#example21
>>> * RDF containers
>>> * RDF reification (in particular, I'm not sure about its relationship
>>> to owl:Axiom reification)
>>>
>>> I'm asking for decisions on whether to include them in the quick
>>> reference. I didn't see their presence in any of the existing OWL 2
>>> documents. Thanks in advance.
>>>
>>> Jie
>>>
>>>
>>>
>>> --
>>> Dipl.-Inform. Michael Schneider
>>> FZI Forschungszentrum Informatik Karlsruhe
>>> Abtl. Information Process Engineering (IPE)
>>> Tel  : +49-721-9654-726
>>> Fax  : +49-721-9654-727
>>> Email: Michael.Schneider@fzi.de
>>> Web  : http://www.fzi.de/ipe/eng/mitarbeiter.php?id=555
>>>
>>> FZI Forschungszentrum Informatik an der Universität Karlsruhe
>>> Haid-und-Neu-Str. 10-14, D-76131 Karlsruhe
>>> Tel.: +49-721-9654-0, Fax: +49-721-9654-959
>>> Stiftung des bürgerlichen Rechts
>>> Az: 14-0563.1 Regierungspräsidium Karlsruhe
>>> Vorstand: Rüdiger Dillmann, Michael Flor, Jivka Ovtcharova, Rudi
>>Studer
>>> Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
>>>
>>>
>
Received on Tuesday, 4 November 2008 23:25:09 UTC

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