There are 2 issues:

1) what is a valid URI -- this is explained in RFC 2396 - particularly
section 3
2) Can any URI be used in a namespace declaration -- that is answered by
the link in the original message.  The W3C XML Plenary has deprecated
usage of relative URI's.  This affects the definition of XML
Canonicalization.

Ted

On Fri, 2002-02-08 at 05:49, Russell Butek wrote:
> I was under the impression that URIs could be arbitrary strings.  Within
> the space of URI's are URLs with specific rules (like starting with http:,
> ftp:, etc) and URNs that start with urn:; but URIs can be anything.  Is
> that impression wrong?
> 
> Russell Butek
> [EMAIL PROTECTED]
> 
> 
> "Theodore W. Leung" <[EMAIL PROTECTED]> on 02/08/2002 12:28:23 AM
> 
> Please respond to [EMAIL PROTECTED]
> 
> To:   [EMAIL PROTECTED]
> cc:   Davanum Srinivas <[EMAIL PROTECTED]>
> Subject:  [PATCH] switch relative URI's in wsdl tests to absolute
> 
> 
> 
> Relative URI's kill XML Signature's required canonicalization -- see
> 
> http://lists.w3.org/Archives/Public/xml-uri/2000Sep/0083.html
> 
> 
> 


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