Re: [xsl] Remove duplicates using preceding- or following-siblings

[David Carlisle <davidc@xxxxxxxxx>]

On 02/04/2012 13:20, Satish wrote:
>     <xsl:if test="count(preceding-sibling::LibraryBook[@authId =
> $authId])">

It would have been easier to answer if you had supplied a full (but 
small) stylesheet and source rather than snippets that can not be run.

Any kind of grouping is easier in xslt 2 than xslt 1 but you didn't say 
which you are using. In xslt 1 using a key ("muenchian grouping" is 
usually more efficient than checking sibling axis but you can optimise 
that later once it is working)

  <xsl:if test="count(preceding-sibling::LibraryBook[@authId =
$authId])">

That test has to look at the node that is being processed, not teh node 
being generated. You are processing book nodes at that point so it woul 
dneed to be


  <xsl:if test="count(preceding-sibling::book[@authId =
$authId])"

however if you changed your for-each to say
 <xsl:for-each select="book[@authorId = $authId][1]">
then you would just pick up the first such node, so would not get 
duplicates.

David


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