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Re: Illegal Characters in Namespace URIs

• To: xml-dev@l...
• Subject: Re: Illegal Characters in Namespace URIs
• From: Elliotte Rusty Harold <elharo@m...>
• Date: Sun, 16 Jun 2002 17:44:58 -0400
• In-reply-to: <3D0CF4F6.1070009@t...>
• References: <20020616180701.15423.qmail@w...><p04330103b9329e85d9af@[192.168.254.4]> <3D0CF4F6.1070009@t...>

At 1:28 PM -0700 6/16/02, Tim Bray wrote:

>Section 1. says "An XML namespace is a collection of names, 
>identified by a URI reference [RFC2396],"; this is echoed in section 
>2., which says  "The attribute's value, a URI reference, is the 
>namespace name identifying the namespace."  Agreed that none of the 
>apparatus of 2396 is copied in, so the constraint is strictly by 
>reference to that RFC.
>

Yes, I read all that. However, document conformance is defined by 
Section 6 which states:

In XML documents which conform to this specification, element types 
and attribute names must match the production for QName and must 
satisfy the "Namespace Constraints".

An XML document conforms to this specification if all other tokens in 
the document which are required, for XML conformance, to match the 
XML production for Name, match this specification's production for 
NCName.

That's it. The next couple of paragraphs elaborate this, but do not 
add any further constraints. Since the URI reference is not part of 
the BNF grammar or a namespace constraint, it seems possible to claim 
conformance with non-URI values.
-- 

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| Elliotte Rusty Harold | elharo@m... | Writer/Programmer |
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|          The XML Bible, 2nd Edition (Hungry Minds, 2001)           |
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