Re: xsl:number and including nodes with xsl:key

<test>
<extra myid="extraid"><name>Extra item</name></extra>
<item>
 <name>Item one</name>
 <name>Item two</name>
 <name>Item three</name>
 <insert ref="extraid"/>
</item>
</test>

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

<!-- identity transform for copying source tree to interim result tree -->
<xsl:template match="@*|node()" name="do-transclusion" mode="copy">
 <xsl:copy>
   <xsl:apply-templates select="@*|node()" mode="copy"/>
 </xsl:copy>
</xsl:template>

<!-- don't output 'extra' nodes to the interim tree; they'll get included
    by 'insert' nodes -->
<xsl:template match="extra" mode="copy"/>

<!-- for 'insert' nodes, insert the content of the specified 'extra' node
    instead. -->
<xsl:template match="insert" mode="copy">
 <xsl:variable name="d" select="key('testkey',@ref)"/>
 <xsl:for-each select="$d/name">
   <xsl:copy-of select="."/>
 </xsl:for-each>
</xsl:template>

<!-- identity transform, for testing -->
<xsl:template match="@*|node()" mode="normal">
 <xsl:copy>
   <xsl:apply-templates select="@*|node()" mode="normal"/>
 </xsl:copy>
</xsl:template>

<!-- number the name nodes so we can see that numbering now works as we need
    it to. -->
<xsl:template match="name" mode="normal">
 <xsl:number/> - <xsl:value-of select="."/>
</xsl:template>

<?xml version="1.0" encoding="UTF-8"?>
<test>

<item>
 1 - Item one
 2 - Item two
 3 - Item three
 4 - Extra item
</item>
</test>