W3C home > Mailing lists > Public > semantic-web@w3.org > June 2008

Re: "Floating" vs "rooted" URIs

From: Tim Berners-Lee <timbl@w3.org>
Date: Wed, 4 Jun 2008 09:30:41 -0400
Cc: "Semantic Web" <semantic-web@w3.org>
Message-Id: <7735B214-102C-46BA-9054-677A79EF7BCD@w3.org>
To: Earle Martin <earle@downlode.org>

Earle,

There is no difference at all.
They are just the same triples.

Tim

On 2008-06 -04, at 01:22, Earle Martin wrote:

> Hello all,
>
> While looking through the Geonames project's ontology
> (http://www.geonames.org/ontology/ontology_v2.0_Lite.rdf), I noticed
> that they define things in the following fashion:
>
>    <owl:Class rdf:about="#Class">
>
> In ontologies I've put together, I've tended to use formulations along
> the lines of:
>
>    <owl:Class rdf:ID="Class">
>
> I can see the difference as being that, when written in an ontology
> available as http://example.com/ont, both say "here we assign
> properties to a URI", but only the latter version says "and this is
> it", providing a sort of physical presence as an identified fragment
> within the document.
>
> Is the former approach a better route to take? It feels less
> restrictive in some fashion. Or is there not really an appreciable
> difference? I suppose that with the open world assumption in effect,
> it's not as if either approach has any bearing on external resources
> making statements about my URIs, either.
>
> Cheers,
>
> Earle.
>
> -- 
> قبائلَ صوتي – على صمتها
> Earle Martin | http://downlode.org/
Received on Wednesday, 4 June 2008 13:31:17 UTC

This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 08:45:07 UTC