Re: [xsl] Keeping track of processed nodes, to avoid redundant output.

Hi John,

You can define a key that matches enElement and use the name attribute. 
Then you can process only the first element that matches a given value:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
version="1.0">
  <xsl:key name="name" match="anElement" use="@name"/>
  <xsl:template match="/">
    <out><xsl:apply-templates/></out>
  </xsl:template>
  <xsl:template match="anElement">
    <xsl:if test="generate-id(.)=generate-id(key('name', @name)[1])">
      <name><xsl:value-of select="@name"/></name>
    </xsl:if>
  </xsl:template>
</xsl:stylesheet>


Regards,
George
---------------------------------------------------------------------
George Cristian Bina - http://aboutxml.blogspot.com/
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com


John Smith wrote:
> Hello,
>
> This is a simplified description of what I am trying to do, I have an
> xml document like this:
>
> <main>
>   <someElement>
>     <anElement name="John" />
>   </someElement>
>   <someElement>
>     <anElement name="Jane" />
>   </someElement>
>   <someElement>
>     <anElement name="John" />
>   </someElement>
>   <someElement>
>     <anElement name="Jane" />
>   </someElement>
> </main>
>
>
> and I like to retrieve each 'name' attribute from 'anElement', but I
> only want to process the name once. So if the 'John' attribute is
> repeated I want to somehow keep track that I have already processed
> it, hence there is no need to process it again.
>
> So for the given example I like to output something like:
>
> <out>
>   <name>John</name>
>   <name>Jane</name>
> </out>
>
>
> Thanks,
> John
>
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