Re: [xsl] Unwanted (default) namespaces.

["David N Bertoni/Cambridge/IBM" <david_n_bertoni at us dot ibm dot com>]

> You're right; that's how I was propogating the <html:br/> tag forward.  I
> have to confess that namespaces are the one area of XSL (I'm currently
> aware of) that I really don't have a handle on, so if you don't mind, I'd
> like to "kick the dead horse" a bit.
>
> In the source XML document, the <html:br/> tag is completely qualified.
> Why is the choice being made to associate an additional (the default)
> namespace with this node?  This seems like it will cause problems in
> environments in which components from multiple namespaces are being
> integrated.   Does this mean we shouldn't define default namespaces in
> situations involving multiple namespaces?  I don't understand why that
> node is being associated with a namespace other than what it was
> explicitly referenced by.   Could you describe what aspect/rule
> associated with the XSL transformation causes this additional namespace
> to be associated with that node?

It's not a "choice," and it's not additional.  If a namespace is in scope,
it's in scope.  Hopefully, you'll agree that if I declare a namespace bound
to a particular prefix, that namespace is in scope in that subtree:

   <foo:bar xmlns:foo="http://foo.com";>
     <foo:bar/>
   </bar>

The default namespace is no different (other than in does not apply to
attributes):

   <bar xmlns="http://foo.com";>
     <foo2:bar xmlns:foo2="http://foo2.com";> <!--  The default namespace,
   "http://foo.com";, is in scope here -->
       <bar/>  <!--  In the namespace "http://foo.com"; -->
     </foo2:bar>
   </bar>

That being the case, the XSLT recommendation requires that when you copy a
node, all the in-scope namespace nodes be copied to the result tree.

You need to understand the XPath data model.  The particulars regarding
namespace nodes are here:

   http://www.w3.org/TR/xpath#namespace-nodes

The particulars for xsl:copy are here:

   http://www.w3.org/TR/xslt#copying

Hope that helps...

Dave



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