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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

    trix:validUntil
       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.

Eh?

Patrick

--

Patrick Stickler
Nokia, Finland
patrick.stickler@nokia.com
Received on Monday, 15 March 2004 02:52:15 UTC

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