Re: [xsl] embed XML island in stylesheet?

[Dan Diebolt <dandiebolt at yahoo dot com>]

David - thanks for your help. 

I am trying to add a fragment of XML to my stylesheet to avoid loading
a ancillary XML document that would conatin some type of lookup information.
For simplicity lets just say that during the course of transforming my
main XML document I need some lookup capability which for the example
can simply be this:

   1 -> one
   2 -> two
   3 -> three
   4 -> four

Your last mail alluded to having two choices a get a handle on the fragment
of lookup XML:

1) stuff the XML lookup fragment into <LookUp:data> and access it with
   the following XPath:

   select="document('')/xsl:stylesheet/LookUp:data"/


2) stuff the lookup fragment into the body of a variable definiton and
   access it with:

   select="$var" 

I know how to do the key definition for the Lookup. I would simply like
to work out the details of addressing the XML fragment by each of the
two methods. Here is my attempt to put both techniques to work in the
same stylesheet:

<?xml version="1.0"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                 xmlns:LookUp="Something"
                 version="1.0">

<LookUp:data>               
   <x>1</x><y>one</y>
   <x>2</x><y>two</y>
   <x>3</x><y>three</y>
   <x>4</x><y>four</y>
</LookUp:data>

<xsl:variable name="var2">
   <x>1</x><y>one</y>
   <x>2</x><y>two</y>
   <x>3</x><y>three</y>
   <x>4</x><y>four</y> 
</xsl:variable>

<xsl:template match="/">
 <xsl:variable name="var1" 
  select="document('')/xsl:stylesheet/LookUp:data"/>
 <xsl:for-each select="$var1/x">
  (<xsl:value-of select="."/>,
  <xsl:value-of select="following-sibling::y[1]"/>)<br/>
 </xsl:for-each>
 <hr/>
 <xsl:value-of select="$var2"/>
 <hr/>
 <xsl:for-each select="$var2/x">
  (<xsl:value-of select="."/>,
  <xsl:value-of select="following-sibling::y[1]"/>)<br/>
 </xsl:for-each>   
</xsl:template>

</xsl:stylesheet>

Here is the result I obtain:

(1,one)
(2,two)
(3,three)
(4,four)
-----------------
1one2two3three4four
-----------------
The XML page cannot be displayed 
Cannot view XML input using XSL style sheet. Please correct 
the error and then click the Refresh button, or try again later. 
Reference to variable or parameter 'var2' must evaluate to a node list.

What is wrong with the second technique? I would like to compare these
two techniques on a common bases so the code is somewhat symmetrical. 

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