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Re: Grouing URIs - an RDF triple with multiple subjects

From: Sandro Hawke <sandro@w3.org>
Date: Mon, 08 May 2006 14:02:30 -0400
To: "Phil Archer" <parcher@icra.org>
Cc: semantic-web@w3.org, "WCL-XG Public List" <public-xg-wcl@w3.org>
Message-Id: <20060508180238.E744B4EECF@homer.w3.org>


> The Web Content Label Incubator Activity [1] is to hold a face to face 
> meeting in Edinburgh on Saturday 20 May. The major topic of conversation 
> will be how one might define a group of URIs so that they, plural, can be 
> the subject of an RDF triple.
> 
> Outside the XG there is interest in this from, among others, the ERT WG [2] 
> (the folk behind EARL).
> 
> Some of you will have heard me talk about how we do this in RDF-CL [3] but 
> we're trying to do a better job of it in the XG.
> 
> If the problem is one you'd like to crack as well, and you are in Edinburgh 
> that Saturday afternoon, you'd be welcome to jon us and try to solve it. 
> Please contact me directly. NB.we are all paying our own way - £35.25 a head 
> for the room [4] and sandwiches for a working lunch.

I'm sorry I can't make it to the meeting, but I'm going to go ahead and
offer a solution, since it seems so clear to me.  :-)

   1.  You need a "uri" property, linking things to strings
       which are unambiguous names (URIs) for them.

   2.  You need a simple rule language.

   3.  The rule language has to have simple/common string functions.

Then you can say "everything which starts with http://www.w3.org/ is
child-safe" like:

    if 
       x.uri.startsWith("http://www.w3.org/")
    then
       icra:ChildSafe(x)

I expect the RIF Working Group (for which I am the W3C staff contact) to
provide something that will work for points #2 and #3.  I'm not sure the
URI property is going to come from.
 
       -- sandro
Received on Monday, 8 May 2006 18:02:43 UTC

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