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Re: status of xsd:duration in OWL (and RIF and SPARQL) - ACTION-164: RDF WG

From: Michael Schneider <schneid@fzi.de>
Date: Thu, 3 May 2012 17:02:12 +0200
Message-ID: <4FA29DF4.60405@fzi.de>
To: "Evain, Jean-Pierre" <evain@ebu.ch>
CC: "'Peter F. Patel-Schneider'" <pfpschneider@gmail.com>, "public-owl-wg@w3.org" <public-owl-wg@w3.org>, "public-rif-wg@w3.org" <public-rif-wg@w3.org>, "public-rdf-dawg@w3.org" <public-rdf-dawg@w3.org>, public-rdf-wg <public-rdf-wg@w3.org>
Am 03.05.2012 16:20, schrieb Evain, Jean-Pierre:
> As a humble user, I would welcome this addition of duration because we need it in the AV industry (I am form the European Broadcasting Union).
> Also, if not already solved, having date and time as separate datatype would be cool.

Sure, but, I'm afraid, the question here is not so much on coolness, but 
more on whether a certain datatype qualifies /technically/ to be 
included in the set of OWL 2 and RIF datatypes, and, of course, also 
whether the formal W3C standardization process allows a not-fully-closed 
W3C working group (after 2 1/2 years of dormancy) to add new features to 
an already finished recommendation. And, for me at least, these 
questions are not trivially to be answered. Btw, doing so may have the 
not-so-nice side effect to make a large set of currently available OWL 2 
tools incomplete w.r.t. OWL 2, at least for some time of transition...

Just a note from a notoriously un-cool guy,

> I currently have in my ontologies duration expressed as dateTime (or edit units to timecode) and dateTime is a pain :--)
> Jean-Pierre
> -----Original Message-----
> From: Peter F. Patel-Schneider [mailto:pfpschneider@gmail.com]
> Sent: mercredi, 2. mai 2012 18:12
> To: public-owl-wg@w3.org
> Cc: public-rif-wg@w3.org; public-rdf-dawg@w3.org; public-rdf-wg
> Subject: status of xsd:duration in OWL (and RIF and SPARQL) - ACTION-164: RDF WG
> The XSD 1.1 specs are have finally achieved REC status!
> http://www.w3.org/TR/xmlschema11-2/
> There appears to have been some late work on xsd:duration, which may have made
> it suitable for use in RDF and OWL.  The RDF WG is poised to add xsd:duration
> to the recommended/permitted/approved (whatever) list of XSD datatypes for RDF.
> Could the OWL WG provide *advisory* input as to whether this is a bad idea?
> Ideally, if RDF adds xsd:duration, OWL should as well, so it would be good if
> the OWL WG could determine whether the current definition of xsd:duration will
> be "added" to OWL.
> If RIF and SPARQL WGs are active, they may also want to take a look at
> xsd:duration.
> peter
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Dipl.-Inform. Michael Schneider
Research Scientist, IPE / WIM

FZI Forschungszentrum Informatik
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Forschungszentrum Informatik (FZI) an der Universität Karlsruhe
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Vorstand: Dipl. Wi.-Ing. Michael Flor, Prof. Dr. Ralf Reussner,
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Received on Thursday, 3 May 2012 15:02:49 UTC

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