RE: [xsl] keyed lookup table

["Michael Kay" <mike@xxxxxxxxxxxx>]

This works for me:

<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>

<xsl:variable name="language-table">
  <name code="ar">ARABIC</name>
  <name code="de">GERMAN</name>
  <name code="en">ENGLISH</name>
  <name code="zh">CHINESE</name>
</xsl:variable>

<xsl:key name="language-code" match="name" use="@code"/>

 <xsl:template match="/">
  <xsl:variable name="stylesheet" select="document('')"/>
  <xsl:value-of select="key('language-code', 'de', $stylesheet)"/>
 </xsl:template>

</xsl:stylesheet>

run against itself outputs

GERMAN

As DC said, though, document('') is inefficient and in 2.0 is never
necessary. 

    key('language-code', 'de', $language-table)

gives the same result and is much more efficient.

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



> -----Original Message-----
> From: Kevin Rodgers [mailto:kevin.rodgers@xxxxxxx] 
> Sent: 17 February 2005 16:44
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] keyed lookup table
> 
> I've got a working lookup table implemented like this:
> 
> <xsl:variable name="language-table">
>   <!-- See ISO 639 -->
>   <name code="ar">ARABIC</name>
>   <name code="de">GERMAN</name>
>   <name code="en">ENGLISH</name>
> ...
>   <name code="zh">CHINESE</name>
> </xsl:variable>
> 
> that I can access in my templates with an expression like:
> 
> 	$language-table/name[@code='de']
> 
> I was hoping I could access that table via a key:
> 
> 	<xsl:key name="language-code" match="name" use="@code"/>
> 
> that I would access with this expression:
> 
> 	key('language-code', 'de', $stylesheet)"/>
> 
> given:
> 
> 	<xsl:variable name="stylesheet" select="document('')"/>
> 
> But the key function always returns an empty sequence.  Why?  
> Can I use
> a key on these $language-table/name nodes, which are internal to the
> stylesheet?  (I'm sure it will work if I move the lookup 
> table from the
> stylesheet to its own external XML document, which is more 
> maintainable
> anyway, but I want to udnerstand what is wrong with the idea 
> of a keyed
> lookup table within the stylesheet.)
> 
> Thanks,
> -- 
> Kevin