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Re: Named graphs etc

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Mon, 15 Mar 2004 09:51:47 +0200
Message-Id: <9C73D401-7655-11D8-A56E-000A95EAFCEA@nokia.com>
Cc: ext Pat Hayes <phayes@ihmc.us>, www-archive@w3.org, chris@bizer.de
To: "ext Jeremy Carroll" <jjc@hplb.hpl.hp.com>

On Mar 12, 2004, at 17:05, ext Jeremy Carroll wrote:

> Another tricky issue which we need a simple solution to is time.
> Particularly for publishers who are not using signatures, (which is 
> almost everyone at the moment), we may want to provide vocabulary to 
> time-out an affirmation. e.g. an affirmation may have a start time and 
> an end time explicitly associated with it. (or implicitly using OWL 
> semantics say).
> Jeremy

How about a simple property such as

       a trix:GraphQualificationProperty ;
       rdfs:description "Specifies the date after which the graph is no 
longer considered valid (or asserted)." ;
       rdfs:domain trix:Graph ;
       rdfs:range xsd:date .

Thus, expiration is disjunct from assertion. Even quoted graphs can 
expire. But
an expire graph is clearly not asserted by the publisher.




Patrick Stickler
Nokia, Finland
Received on Monday, 15 March 2004 02:52:15 UTC

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