SAX2 Namespace Support

Leigh Dodds ldodds at
Thu Jan 6 15:55:46 GMT 2000

> -----Original Message-----
> From: owner-xml-dev at [mailto:owner-xml-dev at]On Behalf Of
> Hunter, David
> Sent: 06 January 2000 15:37
> To: 'David Megginson'; xml-dev
> Subject: RE: SAX2 Namespace Support

> I don't want to flog any dead horses, so I hope this hasn't been covered
> already, but is it really an error to have the same namespace declared
> twice, with different prefixes?  i.e., is the following really not legal
> <tag xmlns:p1="urn:person:000-000-000"
>      xmlns:p2="urn:person:000-000-000">
>   <p1:first>John</p1:first>
>   <p2:last>Smith</p2:last>
> </tag>

No its not illegal, its perfectly valid according to the spec.
Just nonsensical (at least to me). 

The discussion is relating to the point of whether the 
QNames of the following QNames should compare equal in the Java:

{"p1", "first", "urn:person:000-000-000"}
{"p2", "first", "urn:person:000-000-000"}

If you've read the spec, then the answer seems yes. The 
debate is still open as to what the 'expected' behaviour 
might be in an == or equals() operation.

> And, if that is illegal, is the following legal:
> <tag xmlns="urn:person:000-000-000"
>      xmlns:p1="urn:person:000-000-000">
> <!--etc.-->

Thats legal too.


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