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Re: Question (RE: rdfs:isDefinedBy (Was Re: Representing DCMI semantics as RDF schemas versus Web pages))

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Thu, 06 Jun 2002 15:25:54 +0300
To: ext Manos Batsis <m.batsis@bsnet.gr>, Bill de hOra <dehora@eircom.net>
CC: RDF Interest <www-rdf-interest@w3.org>
Message-ID: <B9252F82.16388%patrick.stickler@nokia.com>

On 2002-06-06 13:17, "ext Manos Batsis" <m.batsis@bsnet.gr> wrote:

> 
> 
>> -----Original Message-----
>> From: Bill de hOra [mailto:dehora@eircom.net]
> 
>>> From: www-rdf-interest-request@w3.org
>>> [mailto:www-rdf-interest-request@w3.org] On Behalf Of Patrick
>>> Stickler 
> 
>>> So, sticking some RDF schema on a server under the namespace
>>> URL won't work anyway.
>> 
>> No, it'll work, this is the web after all. It just won't be implied
>> by RDF. We can bang on about the semantics of XML namespaces with
>> respect to RDF, but  people will go out and get things to work in
>> an ad-hoc case by case fashion a la RDDL.
> 
> Since namespaces won't do, a question on (other) hacks and how effective
> they can be. I'm interested on 'per type' or 'per property' validation.
> Suppose I have an RDF schema accessible on-line, can I just use rdf:type
> from within instances of Objects to point to their validation module.
> No?

Sure. But the key point is that you already have that schema available.

If all you have is the resource URI, and you have no further knowledge
in your database about that resource (no rdfs:isDefinedBy or rdfs:seeAlso
statements, etc.) then your stuck -- unless you resort to untrustworth
hacks based on guessing stuff about the structure of the resource URI
itself.

The long term solution, IMO is a distributed redirection knowledgebase
that simply stores such "see also" or "go there" type information about
resources, whether or not web-accessible, and applications can access
them similarly to DNS to *reliably* and unambiguously obtain pointers
to knowledge stores which can provide additional information about
the resource. And that solution would work for any arbitrary URI, not
just http: URIs.

Cheers,

Patrick


> Thanks for any pointers,
> 
> Manos
> 

--
               
Patrick Stickler              Phone: +358 50 483 9453
Senior Research Scientist     Fax:   +358 7180 35409
Nokia Research Center         Email: patrick.stickler@nokia.com
Received on Thursday, 6 June 2002 08:21:53 GMT

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