RE: [xsl] Counting nodes processed

[JAY SCHERER <jay.scherer@xxxxxxxxxx>]

You made a reference to redesigning the xml to reduce processing requirements.  Are you referring to the solution that Tom has provided, or are you actually talking of reworking my xml description?

-----Original Message-----
From: cutlass [mailto:cutlass@xxxxxxxxxxx]
Sent: Monday, March 04, 2002 11:18 AM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Counting nodes processed


Hello Jay,

yes, my brain is elsewhere today ! Thomas solution is definately the way to
go,

this is a classic example of where simple redesign of your xml would reduce
processing requirements.....there is another solution, using position(),
which is vastly more complex.... and highlights some of the silliness one
has to go through to do seemingly simple things in xml.

hmmm still thinking though

cheers, jim fuller

----- Original Message -----
From: "Thomas B. Passin" <tpassin@xxxxxxxxxxxx>


> [JAY SCHERER]
>
> > I've got a need to limit the amount of ouput generated in a translation.
> Assume the following xml
> >
> > <category value="category1">
> >   <topic value="topic1"/>
> >   <topic value="topic2"/>
> >   <topic value="topic3"/>
> > </category>
> > <category value="category2">
> >   <topic value="topic1"/>
> >   <topic value="topic2"/>
> >   <topic value="topic3"/>
> > </category>
> >
> > How would I limit my total number of topics output to say 4 topics?
This
> is straight forward in code, but not sure how to do it xsl?  Basically the
> output would be topic1,2 and 3 from category1 and topic 1 from category 2
> >
>
> cutlass <cutlass@xxxxxxxxxxx> suggested using position(), but that may not
> work because position() depends on the context of the current node, which
> can vary depending on how you refer to it.  It is easy to get unexpected
> results using position().
>
> Here is a different approach.  You first select just those topics you want
> to use.  If you want to output just four topics, you can select those
topics
> where the count of  all preceding topic elements  is less than 4.  This
will
> work unambiguously.
>
> Here's what it might look like:
>
> ====================================
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>
> <xsl:variable name='allowed-elements'
> select='/doc/category/topic[count(preceding::topic)&lt;4]'/>
>
> <xsl:template match="/">
> <results>
>  <xsl:apply-templates select='$allowed-elements'/>
> </results>
> </xsl:template>
>
> <xsl:template match='topic'>
>  <xsl:value-of select='ancestor::category[1]/@value'/>-- <xsl:value-of
> select='@value'/><br/>
> </xsl:template>
>
> </xsl:stylesheet>
> ================================
>
> Here is the result (the <br/> is there only to give an artificial line
feed
> for visual formatting in Internet Explorer):
>
> ===============================
> <results>
>   category1-- topic1
>   <br />
>   category1-- topic2
>   <br />
>   category1-- topic3
>   <br />
>   category2-- topic1
>   <br />
>   </results>
> ==================================
>
> Cheers,
>
> Tom P
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>


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