<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="test.xsl"?>
<document
   file="include.xml">
   <extra type="introduction"><p>barfoo</p></extra>
</document>

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="test.xsl"?>

<document>
   <p> foobar </p>
</document>

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   version="2.0">

   <xsl:key
       match="extra"
       name="extra"
       use="@type"/>

   <xsl:template
       match="extra"/>
   <xsl:template
       match="p">
       <p>
           <xsl:apply-templates/>
       </p>
   </xsl:template>

Sincerely,
Steven

On 24/01/2008, Steven Ericsson-Zenith <steven@xxxxxxxxxxxxx> wrote:

The first call to the root node stores a value in a key and the second
call is meant to use the key value.

For the second call to use the key on the first document you need to
do a bit of extra work in XSLT 1.0 eg

<xsl:variable name="val" select="val to use in key look up"/>
<xsl:for-each select="$first-doc">
<xsl:apply-templates select="key('keyname', $val)"/>
</

...because the key will only ever be applied to the current document,
so you have to switch back to the first document before making the
call.

XSLT 2.0 remedies this by providing a third argument to key to tell it
which document should be used:

key('keyname', value, $first-doc)

If that's a bit hard to follow, produce the test case and it will be
easier to show you with that.

cheers
--
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/