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Re: Can RDDL and RDF coexist?

• To: Paul Prescod <paul@p...>
• Subject: Re: Can RDDL and RDF coexist?
• From: Uche Ogbuji <uche.ogbuji@f...>
• Date: Thu, 06 Jun 2002 23:07:36 -0600
• Cc: xml-dev@l...
• In-reply-to: Message from Paul Prescod <paul@p...> of "Thu, 06 Jun 2002 14:22:59 PDT." <3CFFD2B3.1024DED3@p...>
• Sender: uche.ogbuji@f...

> I am not entirely satisfied with the answers to Roger's question.
> 
> Let's say I am working my way through a maze of hyperlinked RDF/XML
> documents. I come upon a new namespace I've never seen. I want to figure
> out the semantics of that namespace, especially if there is a chance
> that it is an extension of one I already know and understand. Therefore
> I want to get from the document to its schema definition(s).
> 
> I think that following the namespace is a reasonable way. How do the
> various assembled luminaries propose to do this?

No one is saying you cannot follow the namespace.  However, the namespace is an artefact of the serialization, and thus entirely incidental to the model.  Maybe the following example illustrates the point.  The following 2 documents:

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns:book="http://spam.com"
>
  <rdf:Description rdf:about="http://www.xfront.com//BookCatalogue.xml">
    <book:Creator>Roger L. Costello</book:Creator>
  </rdf:Description>
</rdf:RDF>

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns:book="http://spam.comC"
>
  <rdf:Description rdf:about="http://www.xfront.com//BookCatalogue.xml">
    <book:reator>Roger L. Costello</book:reator>
  </rdf:Description>
</rdf:RDF>

Are *identical* as far as RDF is concerned.


-- 
Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
Track chair, XML/Web Services One (San Jose, Boston): http://www.xmlconference.com/
DAML Reference - http://www.xml.com/pub/a/2002/05/01/damlref.html
The Languages of the Semantic Web - http://www.newarchitectmag.com/documents/s=2453/new1020218556549/index.html
XML, The Model Driven Architecture, and RDF @ XML Europe - http://www.xmleurope.com/2002/kttrack.asp#themodel

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