Re: URIEquivalence-15 and IRIs

Hello Noah,

At 22:33 02/06/04 -0400, wrote:

>Misha Wolf writes:
> >> Reasons to be careful include that the decisions taken on these
> >> -  will be with us for a long time :-)
> >> -  will affect URI matching in XML Namespaces
> >> -  will affect URI matching in RDF
>That bit about namespace matching makes me nervous.  Last time
>namespace matching came up I think we generated 3000+ emails,
>and only barely eked out consensus.
>Seriously: I think we should approach changes to namespace
>matching with great trepidation, if at all.

As far as I know, namespace matching is done 'character-by-character',
i.e. '', '', and
'' are all considered as different namespaces.

This was the main reason why I was so careful to not press more
directly for what Tim Bray called the 'obviously correct' solution.

>As an implementor, I
>can confirm that namespaces are already a very serious impediment
>to truly high performance XML processing.  Any further changes
>(or even clarifications) to matching rules should be evaluated
>with great care.  The performance considerations for namespace
>matching (and perhaps for RDF as well) are not necessarily the
>same as when URIs are used for resource retrievals.

I think that for RDF, the main consideration is that it is
based on namespaces, so it doesn't want to do anything
different from namespaces.

Regards,    Martin.

>Noah Mendelsohn                              Voice: 1-617-693-4036
>IBM Corporation                                Fax: 1-617-693-8676
>One Rogers Street
>Cambridge, MA 02142

Received on Wednesday, 5 June 2002 03:39:04 UTC