Pete,
Import our rdf schemas using the ARP parser
(http://www.hpl.hp.com/semweb/arp.html). Our current schemas do not
reference the types or terms namespaces. We reference dc:title,
dc:language, dc:date, etc., but nothing for dcq:xxx or dctype:yyy (assume
the proper associations for the dc, dcq and dctype labels). Fortunately
this is a case where we do not have to rely on theory. A simple test should
suffice.
This may change with the version that Dan and Roland are working on. Hope
this helps.
Regards,
Harry
> -----Original Message-----
> From: Pete Johnston [mailto:[log in to unmask]]
> Sent: Tuesday, May 28, 2002 8:50 AM
> To: [log in to unmask]
> Subject: Re: Registry Update & Call for Volunteers!
>
>
> I said:
>
> > 2. If I select, the option "Namespaces" from that dropdown
> > list (without making any other entries on the form), I only
> > see 4 items found:
>
> <snip />
>
> > But there are clearly two other namespaces indexed
> (dcmitype, dcterms)
>
> > and I (correctly) see 6 "Schemas", so looks like a glitch
> somewhere in
>
> > that query?
>
> Harry said:
>
> > No, this is correct. The schemas that have been imported
> only include
>
> > references to the 4 namespaces listed. It is not enough to simply
> > list the NS in the schema. It has to be referenced (this may be
> > particular to the parser we are using?). Please let me know if this
> > explaination is not clear. I had to look at this a while myself.
>
> I don't quite understand this, I must admit... ;-)
>
> I guess I'm not quite sure what you mean by "references to
> namespaces".... My understanding is that at the RDF level, XML
> namespaces aren't explicitly "visible" at all - references
> are to typed
> resources identified by URIs, and (in the schemas indexed by the
> registry) none of these resources is explicitly typed as a
> "namespace".
>
> So does "references to namespaces" mean "references to the resources
> identified by URIs which are also declared as XML Namespace names"? Or
> is it on the basis of use of a URI as the value of an rdfs:isDefinedBy
> property?
>
> In either case, it seems that there are plenty of references to the
> resource identified by the URI http://purl.org/dc/terms/ in
> the RDF/XML
> document at
>
> http://dublincore.org/2001/08/14/dcq#
>
> There are similar references to the resource identified by the URI
> http://purl.org/dc/elements/1.1/ in
>
> http://dublincore.org/2001/08/14/dces#
>
> So on this basis, I guess I'm just not clear why
>
> http://purl.org/dc/elements/1.1/
>
> does show up in the registry interface as a "namespace", but
>
> http://purl.org/dc/terms/
>
> does not.
>
> The impression to the user is that terms in the
> http://purl.org/dc/terms/ namespace are not "covered" by the registry,
> when in fact they are.
>
> Pete
>
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