Trouble creating XSLT solution... need ideas

toskers · October 17th, 2011, 02:51 PM

Hi all,

I'm having trouble coming up with the correct XSLT code and was wondering if anyone could point me in the right direction. This is what I need to do...

I've got an xml tree with pages like so:

Code:

<page>
<title>A<title>
<subtitle>I</subtitle>
<item>1</item>
</page>
<page>
<title>D<title>
<subtitle>V</subtitle>
<item>7</item>
</page>
<page>
<title>A<title>
<subtitle>II</subtitle>
<item>5</item>
</page>
<page>
<title>A<title>
<subtitle>I</subtitle>
<item>9</item>
</page>

I want to be able to write some XSL code to display the data in a nested format like so:

Code:

-A
  -I
    -1
    -9
  -II
    -5
-D
  -V
    -7

So far I'm able to select a <title> and print the <subtitle>s of all <page>s that have said <title>. However, I can't figure out how to do the two-level iteration.

Here is a snippet of my code.

Code:

<xsl:template match="/">
<xsl:apply-templates select="//page[./title[not(.=preceding::title)]]"/> 
</xsl:template>

<xsl:template match="page">
<xsl:variable name="fac"><xsl:value-of select=".//title"/></xsl:variable>
 <ul>
    <xsl:for-each select="//page[title = $fac]">
       <li>..print out sub-title...</li>
    </xsl:for-each>
 </ul>
</xsl:template>

mhkay · October 18th, 2011, 04:09 AM

This appears to be a grouping problem. Something like:

Code:

<xsl:for-each-group select="page" group-by="title">
  <div class="title"><xsl:value-of select="current-grouping-key()"/></div>
  <xsl:for-each-group select="current-group()" group-by="subtitle">
     <div class="subtitle"><xsl:value-of select="current-grouping-key()"/></div>
     <xsl:for-each select="current-group()">
        <div class="item"><xsl:value-of select="./></div>
     </
  </
</

That's XSLT 2.0 of course - if you want a 1.0 solution, you'll have to learn about Muenchian grouping.