Re: [xsl] Global namespace prefixes (Corrected Examples)

[David Carlisle <davidc@xxxxxxxxx>]

> And it works. Output:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <output xmlns:dap="http://xml.opendap.org/ns/DAP/3.2#";>
>    <ns0:Conventions xmlns:ns0="http://base.document/att#";>CF-1.0</ 



I'm surprised by those prefixes. An XSLT 1 processor is given a lot of
freedom to change prefixes at will, but most do not do so unless forced
to do so to avoid a namespace clash.

saxon6 (the old xslt 1 version of saxon)

produces


$ saxon mns.xml mns.xsl
<?xml version="1.0" encoding="UTF-8"?>
<output xmlns:dap="http://xml.opendap.org/ns/DAP/3.2#";>
    
   <Conventions xmlns="http://base.document/att#";>CF-1.0</Conventions>
    
   <logname xmlns="http://base.document/att#";>olson</logname>
    
   <host xmlns="http://base.document/att#";>bb0001en</host>

</output>


In XSLT2 the system wuld have to generate unprefixed names in this
context and saxon9 produes the same result:


$ saxon9 mns.xml mns.xsl
Warning: at xsl:stylesheet on line 5 column 9 of mns.xsl:
  Running an XSLT 1.0 stylesheet with an XSLT 2.0 processor
<?xml version="1.0" encoding="UTF-8"?>
<output xmlns:dap="http://xml.opendap.org/ns/DAP/3.2#";>
    <Conventions xmlns="http://base.document/att#";>CF-1.0</Conventions>
    <logname xmlns="http://base.document/att#";>olson</logname>
    <host xmlns="http://base.document/att#";>bb0001en</host>
</output>


Note that while no prefixes are generated the namespace declaration does
appear multiple times as there is no parent element with the same
namespace. If the element <output> was placed in the namespace instead of
no-namespace then the namespace would only need to be declared once.


If I change the stylesheet to

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
       xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
       xmlns:dap="http://xml.opendap.org/ns/DAP/3.2#";
       >
    <xsl:output method='xml' version='1.0' encoding='UTF-8'  
indent='yes'/>

    <xsl:template match="dap:Dataset" >
         <xsl:element name="output" namespace="{/dap:Dataset/@base}/att#">
             <xsl:apply-templates />
	 </xsl:element>
    </xsl:template>

    <xsl:template match="dap:Attribute" >
        <xsl:element name="{@name}"
 namespace="{/dap:Dataset/@base}/att#"><xsl:value-of select="." /></xsl:element>
    </xsl:template>

</xsl:stylesheet>

I get


$ saxon mns.xml mns.xsl
<?xml version="1.0" encoding="UTF-8"?>
<output xmlns="http://base.document/att#";>
    
   <Conventions>CF-1.0</Conventions>
    
   <logname>olson</logname>
    
   <host>bb0001en</host>

</output>


David

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