Re: [wss] Proposed text on C14N

[merlin <merlin@baltimore.ie>]

r/rsalz@datapower.com/2003.08.29/18:23:41
>> >>       <i:innermost xmlns:i="foo.com" ID="foo">foo</i:innermost>
>>
>> With respect to the above example, placing the namespace
>> declaration here or in an ancestor will make no difference;
>
>My intent was to point out that *if* the above were done (which I believe
>it an impossible barrier), *then* it would be possible to define a c14n
>mechanism that ignored the inherited characteristic of namespaces.

I'm not so sure. XMLDSIG is defined in terms of the XPath
info set, which does not 'see' duplicate namespace
declarations.
   <Foo xmlns:foo="urn:foo">
     <ToBeSigned wsu:Id="tbs">
       <Bar xmlns:foo="urn:foo"> ...

As far as the XPath info set (and thus XMLDSIG) is concerned,
that inner xmlns:foo does not exist: _Every_ descendant of
Foo has xmlns:foo="urn:foo" unless it contains a different
declaration.

But, as you say, it would be futile anyway.

merlin


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