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RE: [xsl] Namespace de-duplication for dynamically generated elements

2008-09-09 04:44:52

At the point where you generate the top-level element, do 

<output>
  <xsl:copy-of select="/order/namespace::*"/>

Michael Kay
http://www.saxonica.com/

For reasons which I won't bore you with, we have an input XML 
format of the style:

customer1.xml:
<order xmlns:pt="urn:ex">
    <foo name="pt:zip"> apple </foo>
    <foo name="pt:zap"> orange </foo>
</order>

customer2.xml:
<order xmlns:go="urn:ex">
    <foo name="go:zip"> pear </foo>
    <foo name="go:zap"> banana </foo>
</order>

We want a single XSLT which will handle these without a 
priori knowledge of the QNames or namespace *inside* the 
@name attribute.  We need to transform these into:

customer1-out-desired.xml:
<output xmlns:pt="urn:ex">
    <pt:zip> apple </pt:zip>
    <pt:zap> orange </pt:zap>
</output>

customer2-out-desired.xml:
<output xmlns:go="urn:ex">
    <go:zip> pear </go:zip>
    <go:zap> banana </go:zap>
</output>

After a long struggle, I've managed some hacky XSLT which 
manages the namespace mapping from strings and NS 
declarations to prefixed QName elements, however I end up 
getting the xmlns:pt="urn:ex" element on
*every* leaf element (e.g. <go:zip xmlns:go="urn:ex">), 
rather than just once on the document element as I would like it:


customer1-out-actual.xml:
<output>
    <pt:zip xmlns:pt="urn:ex"> apple </pt:zip>
    <pt:zap xmlns:pt="urn:ex"> orange </pt:zap> </output>

customer2-out-actual.xml:
<output>
    <go:zip xmlns:go="urn:ex"> pear </go:zip>
    <go:zap xmlns:go="urn:ex"> banana </go:zap> </output>

Does anyone know of any tricks to avoid this situation?

Cheers,

Ian

PS - The relevant XSLT snippet I've written is:

  <xsl:template match="foo">
    <xsl:element name="{substring-after(@name,':')}"
      
namespace="{namespace-uri-for-prefix(substring-before(@name,':'),.)}">
       <xsl:value-of select=".">
    </xsl:element>
    </xsl:template>

--
Ian(_dot_)Stokes-Rees(_at_)spmetric(_dot_)com +1 (617) 418-4168 SP Metric 
Limited, Technology Consulting


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