[xsl] Problem with grouping sibling tags

[Casper Voortman <casper.voortman@xxxxxxxxxxxx>]

Hey everyone,

I have a problem within an xslt i'm writing that i just can't figure  
out how to solve. I think i have to use either some kind of grouping  
or work with preceding-sibling or following-sibling, maybe even both  
combined together. It has to be done in xslt version 1.0 which (for as  
much as i have read on it) seems to be more complicated on itself as  
far as groupings and such go.

Here is a small description together with some samples.

The XML follows a structure like the following ( i have replaced the  
original text for 'textcontent' and 'bullet' otherwise it would get  
too long a mail):

<?xml version="1.0" encoding="UTF-8"?>
<ArticleContent>
    <Frame Label="BroodTekst">
        <Paragraph Pstyle="Tussenkop">
            <Text Cstyle="[No character style]">textcontent</Text>
            <Text Cstyle="[No character style]"/>
        </Paragraph>
        <Paragraph Pstyle="PlattetekstInitiaal">
            <Text Cstyle="[No character style]">textcontent</Text>
        </Paragraph>
        <Paragraph Pstyle="PlattetekstBullet">
            <Text Cstyle="[No character style]">bullet1</Text>
        </Paragraph>
        <Paragraph Pstyle="PlattetekstBullet">
            <Text Cstyle="[No character style]">bullet2</Text>
        </Paragraph>
        <Paragraph Pstyle="Plattetekst">
            <Text Cstyle="[No character style]">textcontent</Text>
        </Paragraph>
        <Paragraph Pstyle="Plattetekst">
            <Text Cstyle="[No character style]">textcontent</Text>
        </Paragraph>
        <Paragraph Pstyle="PlattetekstBullet">
            <Text Cstyle="[No character style]">bullet3</Text>
        </Paragraph>
    </Frame>
</ArticleContent>

This needs to be converted to another XML file that has the following  
structure:

<?xml version="1.0" encoding="utf-8"?>
<section role="broodtekst">
<title role="tussenkop">textcontent</title>
<para role="plattetekstinitiaal">textcontent</para>
<itemizedlist>
	<listitem>
	   <para role="plattetekstbullet">bullet1</para>
	</listitem>
	<listitem>
	   <para role="plattetekstbullet">bullet2</para>
	</listitem>
</itemizedlist>
<para role="plattetekst">textcontent</para>
<para role="plattetekst">textcontent</para>
<itemizedlist>
	<listitem>
	   <para role="plattetekstbullet">bullet3</para>
	</listitem>
</itemizedlist>
</frame>

Now my problem is with the original tags <Paragraph  
Pstyle="PlattetekstBullet"> these need to be grouped together in the  
new tag <itemizedlist>, but the structure within the story needs to  
stay intact. So when another <Paragraph Pstyle="PlattetekstBullet">  
appears that is not preceded or followed by the same <Paragraph  
Pstyle="PlattetekstBullet"> tag they need to be grouped as well  
separately.

I can provide the XSLT i have sofar if needed, but it's a fairly long  
one and it might clutter the issue.

Any help would be greatly appreciated and would make my x-mas.

Regards,

Casper Voortman