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Re: New proposal (Re: getting rid of xsd:dateTime ?)

From: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
Date: Wed, 06 Apr 2011 11:09:34 +0200
Message-ID: <4D9C2DCE.7010401@liris.cnrs.fr>
To: Felix Sasaki <felix.sasaki@fh-potsdam.de>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
On 04/06/2011 09:35 AM, Felix Sasaki wrote:
> This sounds good to me, so also a +1 like Florian in this thread. I
> think it might be worthwhile to explain the issue in our spec, basically
> use your text in this thread, so that users understand the rationale.

of course; I'll try to make a full proposal by next telecon (in 2 weeks)

> Out of curiosity: Do you know why OWL2-RL only supports the above date /
> time related types?

no idea :-/
(and it becomes even trickier, see other thread)
> 
> Felix
>  
> 
> 
>     On the one hand, I'm afraid that this is only translating the problem
>     from the ontology to the data: if people publish data using a datatype
>     not supported by OWL2-QL, will their data be correctly processed by a
>     OWL2-QL inference engine?...
> 
>     On the other hand, this would *allow* people to use the correct datatype
>     if they want to, and/or to be compliant with OWL2-QL if they want to.
> 
>      pa
> 
>     [1] http://www.w3.org/TR/xmlschema11-2/
>     [2]
>     http://www.w3.org/TR/2009/REC-owl2-conformance-20091027/#XML_Schema_Datatypes
>     [3]
>     http://dev.w3.org/2008/video/mediaann/mediaont-api-1.0/mediaont-api-1.0.html#attributes-7
>     [4] http://www.w3.org/TR/owl2-profiles/#Entities_3
> 
>     >
>     > Felix
>     >
>     >
>     >
>     >
>     >     This hinders interoperability a tiny bit, but not as much as
>     inventing a
>     >     day and an hour for media resources for which we only know the
>     year.
>     >
>     >      pa
>     >
>     >
>     >
>     >     To all, some general remarks and conclusions
>     >
>     >     * as most metadata format are more permissive regarding dates than
>     >     xsd:dateTime, I suggest we simply use rdfs:Literal for all our
>     date
>     >     properties, and explain that it should be of the form
>     >     YYYY[-MM[-DD[Thh[:mm[:ss[.fff]]]]]]
>     >
>     >
> 
> 
> 
Received on Wednesday, 6 April 2011 09:10:01 UTC

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