W3C home > Mailing lists > Public > www-rdf-interest@w3.org > November 2000

Re: Of partial reification

From: Pierre-Antoine CHAMPIN <champin@bat710.univ-lyon1.fr>
Date: Fri, 24 Nov 2000 16:17:02 +0100
Message-ID: <3A1E866E.C4DD2C3A@bat710.univ-lyon1.fr>
To: Jonas Liljegren <jonas@rit.se>
CC: Graham Klyne <GK@Dial.pipex.com>, ML RDF-interest <www-rdf-interest@w3c.org>
Jonas Liljegren wrote:
> The variables is necessary if you want something two or more steps
> away.

Not only !
As Graham pointed out :

Graham Klyne wrote:
> What is the purpose of variables in such a query?
> (a) maybe to establish the existence of a given property for a subject,
> without caring about its object value?
>    [?S] --rdf:type-------> [rdf:Statement]
>    [?S] --rdf:subject----> [SomeResource]
>    [?S] --rdf:predicate--> [??]
>    [?S] --rdf:object-----> [??]

The two last lines guarantee that only "full" quads will be retrieved.

I would not stand up a fight for partial statements, though :)
Actually, Graham summed up very well my position is a previous post :
the pain in disallowing them looks greater than the pain in allowing them,
and we should not disallow them only because WE don't see them as useful...

Received on Friday, 24 November 2000 10:20:29 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 7 January 2015 15:07:33 UTC