Re: How best to use recursion/call-templates?

Hello David,

This is a normal grouping problem and therefore the Muenchian Method can be
used (http://www.jenitennison.com/xslt/grouping/muenchian.html).

For your XML:

<xsl:key name="rows" match="row" use="account"/>

<xsl:template match="xml">
    <xsl:apply-templates select="row[count( . | key('rows',account)[1] ) =
1]"/>
</xsl:template>

<xsl:template match="row">
    <span>
        <xsl:value-of select="account"/>
        <xsl:for-each select="key('rows',account)">
            <a><xsl:value-of select="name"/></a>
        </xsl:for-each>
    </span>
</xsl:template>

But a comment to your XML-output:

In my eyes it's not good to have elements together with text-nodes (the
'32')

<span> 32
   <a>smith</a>
   <a>Jones</a>
</span>

So you have to look after whitespaces (for example by using normalize-space)
and can not use <xsl:value-of select="."/>, you must use <xsl:value-of
select="text()"/>. So together you need <xsl:value-of
select="normalize-space(text())"/> to get '32'. With a better XML-structure
you can avoid this.

Regards,

Joerg


> If I have this XML fragment:
>
> <xml>
>  <row>
>     <account>32</account>
>     <name>Smith</name>
>  </row>
>  <row>
>     <account>32</account>
>     <name>Jones</name>
>  </row>
>  <row>
>      <account> 35</account>
>      <name>White</name>
>  </row>
> </xml>
>
> ....then I'd like this output
>
> <span> 32
>    <a>smith</a>
>    <a>Jones</a>
> </span>
>  <span>  35
>     <a> White </a>
>  </span>
>
> In other words:  each account number is in its own <span> tag, and each
> name that has that account # is a link (<a>) inside that span tag.  Since
> Jones and Smith both have the same account #, they are inside the same
> span tags.  Since White has a different account number, there is a
> separate <span> tag.
>
> 1.  How can I achieve this output?
> 2.  Should I use recursion to achieve this?
> 3.  Is this a procedural problem and should I rethink my approach?
>
> What I have tried:  I have tried a number of call-template functions but I
> never seem to get the right result, primarily because I never quite nail
> down the right params to send. I've also tried using preceding-sibling to
> work through this, but I got deeper into trouble.  I'd post my XSL but
> it's terribly convoluted now.   I am admittedly lost. Any suggestions?
>
> David.


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