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Re: Grouing URIs - an RDF triple with multiple subjects

From: Phil Archer <parcher@icra.org>
Date: Mon, 8 May 2006 20:09:59 +0100
Message-ID: <022401c672d3$7811dba0$2ad60c56@PHILXP>
To: <semantic-web@w3.org>
Cc: "WCL-XG Public List" <public-xg-wcl@w3.org>

Thanks Sandro,

I'm sure the RIF's output will inform this discussion in due course  A 
simple rule structure is clearly what is required and I'm only sorry I can't 
take part in that WG - resources/time as ever being the problem. We have _a_ 
way to do it [1] that sets out hosts for which any data can be found, then 
within that allows rules to be set, based as you say, on URIs, but I know 
there are problems with some of the detail and folk who know a zillion times 
more than me about it start to get twitchy about the details. We should have 
our final report published next month so it'll be very much open to 
public/W3C member scrutiny.

Phil.

[1] http://www.w3.org/2004/12/q/doc/content-labels-schema.htm

----- Original Message ----- 
From: "Sandro Hawke" <sandro@w3.org>
To: "Phil Archer" <parcher@icra.org>
Cc: <semantic-web@w3.org>; "WCL-XG Public List" <public-xg-wcl@w3.org>
Sent: Monday, May 08, 2006 7:02 PM
Subject: Re: Grouing URIs - an RDF triple with multiple subjects



> 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 19:13:33 UTC

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