Re: keys with composite values

I'm getting some unexpected results with keys that use composite values.

What I get depends on the other of VERSION elements:
	key('features', '11') => Slices
	key('features', '10') => Dices (but not Slices)

This happens in both Saxon and MSXSL, so I'm guessing there's something I'm
not understanding about keys with composite values.

XML source:

<FEATURES>
	<FEATURE NAME="Slices">
		<VERSION MAJOR="1" MINOR="1"/>
		<VERSION MAJOR="1" MINOR="0"/>
	</FEATURE>
	<FEATURE NAME="Dices">
		<VERSION MAJOR="1" MINOR="0"/>
	</FEATURE>
</FEATURES>

XSLT stylesheet:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="features"
	match="FEATURE[VERSION]"
	use="concat(VERSION/@MAJOR,VERSION/@MINOR)"/>

You are matching FEATURE elements. The key used for
the "Dices" element is easy: '10'. The "Slices" element
has two VERSION childs, which means that both
VERSION/@MAJOR andd VERSION/@MINOR evaluate to node sets
with two nodes in it, coercing to strings results in the
key '11'. This means key("features","11") will get the
"Slices" feature only, and  key("features","10" gets
only "Dices".

In order to get what you want you'll have to match
the VERSION elementsand then use the parent. Try

 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:key name="features"
 	match="VERSION"
 	use="concat(@MAJOR,@MINOR)"/>
   <xsl:template match="FEATURES" >
	<CONTENT>
           <xsl:copy-of select="key('features', '11')/.." />
	</CONTENT>
  </xsl:template>
 </xsl:stylesheet>