Urgent: Help in XSLT ..........

[Chitharanjan Mohandas <cd...@accordiasys.com>]

I have the following requirement.. I am sorry If I have posted
to the woring site. Since cocoon uses XSLT a lot, I guess I
will be better helped here.... Please do help me on this...


Consider the following XML....

I need to extract the description for the language
which appears first when sorted alphabetically.....

In this case I need the description for lang "de" i.e German Descrciption...
The script should extract only for the language de...




<Item>
 <description>
  <lang>en</lang>
  <value>Description</value>
 </description>
 <description>
  <lang>de</lang>
  <value>German Description</value>
 </description>
 <description>
  <lang>es</lang>
  <value>Spanish Description</value>
 </description>
</Item>


Could any one of you please advice me on how to build
an XSLT script to solve this issue...

Thanks and regds,
Chiths


PS: How does one return a XML node from a template....


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Re: Urgent: Help in XSLT ..........

["J.Pietschmann" <j3...@yahoo.de>]

Chitharanjan Mohandas wrote:
> I have the following requirement.. I am sorry If I have posted
> to the woring site. Since cocoon uses XSLT a lot, I guess I
> will be better helped here.... 
Close, but no cigar. The best place to ask XSLT related
questions is still the XSL list:
  http://www.mulberrytech.com/xsl/xsl-list/
THey have a FAQ and an archive there.

> Consider the following XML....
> 
> I need to extract the description for the language
> which appears first when sorted alphabetically.....
> 
> In this case I need the description for lang "de" i.e German Descrciption...
> The script should extract only for the language de...
...
> Could any one of you please advice me on how to build
> an XSLT script to solve this issue...

The easiest way is to use
  <xsl:template match="Item">
    <xsl:for-each select="description">
      <xsl:sort select="lang"/>
      <xsl:if test="position()=1">
        <xsl:copy-of select="."/>
      </xsl:if>
    </xsl:for-each>
  <xsl:template>
This is not very efficient if you have a real lot
of descriptions (run time is O(n*log(n)) instead of
O(n)), but then, I don't think there is an efficient
solution without using an extension function for
lexical string comparisions.

J.Pietschmann


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