Re: Recursive calls to a named template

On Thursday 20 November 2003 13:28, Ram wrote:
> Hi,
>  Can anyone please give me hint how to copy the previous
> operations? Actually, the input xml file is a dynamic one and
> the number of 'group' is arbitrary. The xml source would look
> like this:
>

Cut ...

While on the surface this looks like something you could solve 
using recursion and preceding searches your XML would allow the 
groups to appear in any order since each contains a direct 
reference to the group that should be used to replace the 
signature. In this case the replacing signature could appear 
either before or after the group you are processing. These types 
of operations are normally easier to handle by introducing a key 
such as,

<xsl:key name="GroupByIdentifier" match="group" 
use="identifier[1]"/>

You can then process using a modified identity transform, 
something like this should work,

<xsl:template match="signature">
 <xsl:choose>
  <xsl:when test="count(../identifier[2])&gt;0">
   <xsl:apply-templates 
select="key("GroupByIdentifier",../identifier[2])/signature"/>
   </xsl:when>
   <xsl:otherwise>
    <xsl:copy>
     <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
   </xsl:otherwise>
 </xsl:choose>
</xsl:template>

<xsl:template match="node()|@*">
 <xsl:copy>
  <xsl:apply-templates select="node()|@*"/>
 </xsl:copy>
</xsl:template>

This isn't the most efficient implemetation you could create but 
for small to medium sized number of groups it should be 
sufficient.

Regards,
Kev.



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