[xslt] xsl:key pattern bug?

[Bob Stayton <bobs caldera com>]

I've run into an odd little problem that I think is
an xsltproc bug, or it could be my misunderstanding of xsl:key's
'match' attribute.  It appears that the '|' union operator
in the xsl:key match attribute isn't always handled correctly.

I have two elements that use an 'id' attribute
that I want my key to index.  Here is the
test stylesheet:

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

<xsl:key name="mykey" match="div|obj" use="@id" />

<xsl:template match="link">
   <xsl:value-of select="@linkend"/>
   <xsl:text> </xsl:text>
   <xsl:value-of select="key('mykey', @linkend)/@href" />
</xsl:template>

</xsl:stylesheet>

Here is a small sample document:

<?xml version="1.0" encoding="ISO-8859-1"?>
<div id="div111" href="div111href">
  <div id="div222" href="div222href" >
    <obj id="obj333" href="obj333href" ></obj>
  </div>
  <link linkend="div111"/>
  <link linkend="div222"/>
  <link linkend="obj333"/>
</div>

The output should be:

  div111 div111href
  div222 div222href
  obj333 obj333href

The output actually is:

  div111 div111href
  div222 div222href
  obj333 

(This is using libxml2-2.4.12, libxslt-1.0.9, Linux)

At first I thought it was just ignoring the element 'obj'
after the union operator, but when I change the order
in the key to use match="obj|div", my output  is:

  div111 div111href
  div222 
  obj333 obj333href

This is even stranger, as it missed the nested div element
this time.  My understanding is that the match attribute
uses a pattern, similar to xsl:template. 

Is this a bug?

-- 

Bob Stayton                                 400 Encinal Street
Publications Architect                      Santa Cruz, CA  95060
Technical Publications                      voice: (831) 427-7796
Caldera International, Inc.                 fax:   (831) 429-1887
                                            email: bobs@caldera.com