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RE: [xsl] Grouping a sequence of elements in different ways in the same stylesheet

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I think the answer is to capture the result of the first grouping operation
in a variable, and then apply the second operation to this variable.
Somthing like:

<xsl:template match = "body/div" >
  <xsl:variable name="temp" as="element()*">
    <xsl:for-each-group select = "current-group()" 
         group-adjacent = "name()='p' and @class='bulletedlist'">
        <xsl:apply-templates select = "." mode = "itemizedlist" />
     </xsl:for-each-group>
  </xsl:variable>
  <xsl:for-each-group select = "$temp" group-starting-with =
"p[@class='head1']" >
  </xsl:for-each-group>
</xsl:template>

(But I haven't tried to understand the detail)

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay 

> -----Original Message-----
> From: Peter Desjardins [mailto:peter.desjardins.us@xxxxxxxxx] 
> Sent: 21 May 2010 22:09
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Grouping a sequence of elements in different 
> ways in the same stylesheet
> 
> Hi.  I'm writing a 2.0 stylesheet to convert flat HTML to a 
> hierarchically structured XML format such as DocBook or DITA. 
> I'm new to XSLT.
> 
> I need to group the HTML elements into <section> elements 
> according to heading levels (such as h1, h2, h3). I've got 
> that working using the group-starting-with attribute of 
> <xsl:for-each-group> thanks to help from this list.
> 
> Now I need to wrap other sequences whenever they come up in 
> the source document. For example, whenever bulleted paragraph 
> styles occur, I need to group them in an <itemizedlist> 
> element. I can do this also with the group-adjacent attribute 
> of <xsl:for-each-group>.
> 
> I've gotten stuck trying to group sections and itemized lists 
> at the same time. I need my stylesheet to pass through the 
> entire sequence of elements and perform grouping operations 
> as needed. If a bulleted list occurs at any point, group it. 
> If a h1, h2, or h3 element occurs, start a new group for a 
> <section> element. I'll also need to handle other types of 
> wrapping such as for numbered lists.
> 
> Can anyone point me to an example of that sort of stylesheet? 
> One that performs several types of grouping during the same 
> pass over a sequence of elements? Here's an example of the 
> code I'm using. Both of the grouping operations will work if 
> I use them alone.
> 
> <xsl:template match = "body/div" >
>     <xsl:for-each-group select = "current-group()" 
> group-adjacent = "name()='p' and @class='bulletedlist'">
>         <xsl:apply-templates select = "." mode = "itemizedlist" />
>     </xsl:for-each-group>
>     <!-- How do I perform both of these grouping operations 
> at the same time? -->
>     <xsl:for-each-group select = "*" group-starting-with = 
> "p[@class='head1']" >
>         <xsl:apply-templates select="." mode="group-level-one"/>
>     </xsl:for-each-group>
> </xsl:template>
> 
> Thanks for your help.
> 
> Peter

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