RE: Finding Unique Nodes

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Peter Davis
> Sent: Tuesday, April 02, 2002 1:25 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: Re:  Finding Unique Nodes
> 
> 
> On Monday 01 April 2002 21:04, Ivan Pedruzzi wrote:
> > <?xml version="1.0" encoding="UTF-8"?>
> > <xsl:stylesheet version="1.0" 
> > xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> > <xsl:output method="xml"/>
> > ? <xsl:template match="/">
> > ? ? <list>
> > ? ? <xsl:for-each select="list/item">
> > ? ? <xsl:sort select="list/item"/>
> 
> This sort requires that "/list/item/list/item" exists, "list/item" is 
> relative to the "list/item" that was selected in the 
> for-each.  To do what I 
> think you are trying to do, you want:
> 
> <xsl:sort select="."/>
> 
> > ????????? <xsl:if test="not(following-sibling::item = .)">
> 

Right.

> The test for following-sibling::item is applied on the source 
> document, *not* 
> the document after it has been sorted.  So the sorting will 
> not affect 
> anything.  Also, this is the same as:
> 
> not(./following-sibling::item = .)
> 
> which is always true, because a node is never a 
> following-sibling of itself.  
> Therefore, the next line (<item><xsl:value-of 
> select="."/></item>) will 
> always be executed.

This is interesting because I run the script with
MSXML3/MSXML4/XalanJ/Stylus and all of them print unique values
If you run this stylesheet you can see yourself

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes"/>
  <xsl:template match="/">
    <list>
      <xsl:for-each select="list/item">
        <test><xsl:value-of select="."/>=<xsl:value-of
select="following-sibling::item"/>=<xsl:value-of
select="not(following-sibling::item = .)"/></test>
	  </xsl:for-each>
    </list>
  </xsl:template>
</xsl:stylesheet>

I also run your stylesheet (below) using MSXML3/MSXML4/XalanJ/Stylus the
result is always 0

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:key name="item" match="item" use="string(.)"/>
<xsl:template match="/">
  <xsl:text>Unique items: </xsl:text>
  <xsl:value-of select="count(list/item[count(key('item', string(.)) |
.) = 1])"/>
</xsl:template>
</xsl:stylesheet>


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