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Re: is namespace prefix's name variable?

From: G. Ken Holman <gkholman@CraneSoftwrights.com>
Date: Mon, 14 Jul 2003 10:42:59 -0400
Message-Id: <5.2.0.9.0.20030714103837.028c1e80@pop.storm.ca>
To: xmlschema-dev <xmlschema-dev@w3.org>

At 2003-07-14 10:32 -0400, remko de knikker wrote:
>If I have a schema that defines
>
><xsd:schema
>xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>xmlns:tns="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"
>targetNamespace="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"
> >
><tns:element name="method2Request">
>
>is a XML Document valid when a user changes the 'tns' to 'ns1' for 
>instance, leaving the rest of the definitions intact?
>In other words, is above equal to below??
>
><xsd:schema
>xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>xmlns:ns1="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"
>targetNamespace="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"
> >
><ns1:element name="method2Request">

In namespace processing, the prefix is irrelevant.

But ... neither of the above is valid from a W3C Schema perspective since 
the "element" element of a schema expression needs to be in the W3C namespace.

In XML documents the following are equivalent:

<ns1:method2request
    xmlns:ns1="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"/>

<ns2:method2request
    xmlns:ns2="http://biryani.med.yale.edu:8081/axis/services/GetXSLIM"/>

Note that nothing needs to exist at the URL of the URI ... a namespace 
aware application does *not* attempt to dereference or locate *any* piece 
of information at the address represented by the string.

I hope this helps.

............. Ken


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Received on Monday, 14 July 2003 10:43:08 GMT

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