[XML-SIG] 4xslt bug involving key()

[Thomas B. Passin]

I've just found that a stylesheet construction that I need to use doesn't
work right with 4xslt (the python 1.5.2 version I got from the 4suite.org
site several weeks ago).

The stylesheet takes a number of elements that have duplicated content and
produce a list without duplicates.  It's a simplified Muenchian method,
using <xsl:key/> and key().  It works right with msxml3, saxon, and xalan,
but not 4xslt.  I need to use this in a project I'm in the middle of at
work, so I request the 4thought people (Mike, would that be?) to take a look
at it.

If 4xslt doesn't implement keys (I thought it did), then at least it should
throw an error.

Here are the documents and the results:

<items>
 <a>A</a>
 <a>B</a>
 <a>C</a>
 <a>B</a>
 <a>B</a>
 <a>D</a>
 <a>D</a>
 <a>E</a>
</items>
===============================================================
<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method='text'/>

<xsl:key name='item' match='a' use='.'/>

<!--////// Create a node-set of unique items /////-->
<xsl:variable name='unique-items'
 select="/items/a
   [generate-id()=generate-id(key('item',.)[1])]"/>

<!--////// Test if we really got a unique list /////-->
<xsl:template match="/">
 Original list:
<xsl:copy-of select='items/a'/>
 Should-be-unique list:
<xsl:copy-of select='$unique-items'/>
</xsl:template>
</xsl:stylesheet>
===========================================================
Results from saxon:

D:>saxon unique2.xml unique2.xsl

        Original list:
ABCBBDDE
        Should-be-unique list:
ABCDE


Results from 4xslt (running from a batch file driver):

D:>4xslt unique2.xml unique2.xsl

        Original list:
ABCBBDDE
        Should-be-unique list:
ABCBBDDE

See the problem?

Regards,

Tom P