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   Re: [xml-dev] Declaring the XML namespace

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At 8:47 AM -0400 7/11/02, Thomas B. Passin wrote:

>This conclusion is not clear to me.  If the "xml" prefix is by definition
>bound to that one namespace, seems to me that it __should__ be reported
>whether or not a namespace declaration exists for it in a document.  If the
>prefix is used and there is no declaration, the namespace should be reported
>anyway.  If an incorrect namespace were used, what would be the right error
>behavior?  Report the right namespace and continue?

This is one of many cases where the SAX specification could have been 
defined in multiple ways, none of which are obviously better than any 
other. The SAX developers had to pick one so they did. For 
interoperability it is important that all parsers exhibit the same 

No information is lost by the solution SAX chose. No information 
would be gained by changing this behavior. The Namespaces in XML 
specification requires that the xml prefix be bound to that namespace 
URI and no other. If an incorrect namespace URI were used, then the 
parser would report a namespace error, the same as it would report 
any other namespace error such as an unmapped prefix.

| Elliotte Rusty Harold | elharo@metalab.unc.edu | Writer/Programmer |
|          XML in a  Nutshell, 2nd Edition (O'Reilly, 2002)          |
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