[xquery-talk] Constructing namespace nodes

[David Lee]

I am fairly sure I have answered my own question, but I still can't believe
it.

So maybe I'm missing something obvious.

 

Using XQuery

I need to create an XML file (in this case an XSLT file) with namespaces
declared in the root node that are dynamically constructed.

I'd *like* to do something like this (which doesn't work .)

 

<transform>

   { for $n in $my_namespaces 

                return attribute { concat("xmlns:" , $n/@prefix ) } {
$n/@uri } 

    }

.

 

In this case the list of namespaces needed is *not* available as a static
context in the XQuery.

 

The best I've done so far is to create  bogus attributes in a computed
namespace.

Actual code :

 


document {
    <xsl:stylesheet version="2.0" >
    {
        for $ns in $common:nsmap//ns
        return
            attribute { fn:QName($ns/@uri, concat($ns/@prefix,":bogus"))} {}

    }
     

..

}

 

This creates a bunch of "bogus" attributes and as a side effect also creates
their namespace declarations.

Like this:

 

<xsl:stylesheet  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:ns1="http://www.w3.org/2001/XMLSchema"
                xmlns:ns2="http://www.xmlsh.org/jxml"
                version="2.0"
                ns1:bogus=""
                ns2:bogus=""> 

 

 

The typical case I've seen documented is to simply create the elements you
need in the right namespace then namespace nodes get created properly.

This works fine *IF* you are creating elements or attributes.  But in my
case I am creating the dreaded QNames in Conent.

e.g  XSLT Match expressions with prefixes . so there are no actual elements
or attributers with the namespaces.

 

My question . is there a 'better' way of creating apparently unused
namespace nodes using XQuery based on runtime data ?

 

Thanks for any suggestions.

Fortunately this "hack" actually works with XSLT as it ignores the bogus
attributes . but if I were having to do this for another document type it
may not.

 

 

 

 

 

 

 

 

----------------------------------------

David A. Lee

 <mailto:dlee at calldei.com> dlee at calldei.com

 <http://www.xmlsh.org> http://www.xmlsh.org

 

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