RE: [xsl] xslt 2.0: grouping flat element structures to make

Thanks for the solution David Carlisle, this certainly does the
flat-to-grouped job I need. 

However, one more query (open to anyone): Would I need to add this grouping
processing approach to ALL the possible parent elements that the flat-list
structures can occur in? 

In my DTD there are many parent element possibilities and what's more many
already have a fair amount of complex code in their templates (don't want to
upset this if I can avoid it). That's why I tried to use the first <par
class="Listbegin"> as a kind of trigger for the list processing. Is this
route not the one to take due to XSLT processing model?

Goal (<Any-element> is a wildcard and not necessarily the root):

<?xml version="1.0" encoding="UTF-8"?>
<Any-element>
 <a>some text</a>
 <par class="Listbegin">Fruit</par>
 <par class="Listitem>Apple</par>
 <par class="Listitem>Orange</par>
 <par class="Listitem>Pear</par>
 <a>more text</a>
 <par class="Listbegin">Colours</par>
 <par class="Listitem>Red</par>
 <par class="Listitem>Green</par>
 <par class="Listitem>Blue</par>
 <par class="Listbegin">Shapes</par>
 <par class="Listitem>Triangle</par>
 <par class="Listitem>Circle</par>
 <par class="Listitem>Square</par>
 <a>yet more text</a>
</Any-element>

to produce

<?xml version="1.0" encoding="UTF-8"?>
<data>
 <a>some text</a>
 <list>
  <head>Fruit</head>
  <item>Apple</item>
  <item>Orange</item>
  <item>Pear</item>
 </list>
 <a>more text</a>
 <list>
  <head>Colours</head>
  <item>Red</item>
  <item>Green</item>
  <item>Blue</item>
 </list>
<list>
  <head>Shapes</head>
  <item>Triangle</item>
  <item>Circle</item>
  <item>Square</item>
 </list>
 <a>yet more text</a>
</data>	

Thanks

Derek Revill


> -----Original Message-----
> From: David Carlisle [mailto:davidc@xxxxxxxxx]
> Sent: 25 May 2005 22:30
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: Re: [xsl] xslt 2.0: grouping flat element structures to make
> lists
> 
> 
> 
> <sect>
> 
> <foo/>
> <xyz/>
> <xyz/>
> <par class="Listbegin">Fruit</par>
> <par class="Listitem">Apple</par>
> <par class="Listitem">Orange</par>
> <par class="Listitem">Pear</par>
> <par class="Listbegin">Colours</par>
> <par class="Listitem">Red</par>
> <par class="Listitem">Green</par>
> <par class="Listitem">Blue</par>
> <xyz/>
> <bar/>
> <par class="Listbegin">Fruit</par>
> <par class="Listitem">Apple</par>
> <par class="Listitem">Orange</par>
> <par class="Listitem">Pear</par>
> </sect>
> 
> 
> 
> <xsl:stylesheet
>    version="2.0"
>    xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
> >
> 
> 
> <xsl:output indent="yes"/>
> 
> <xsl:template match="*">
> <xsl:copy>
> <xsl:copy-of select="@*"/>
> <xsl:apply-templates/>
> </xsl:copy>
> </xsl:template>
> 
> <xsl:template match="sect">
> <xsl:copy>
> <xsl:copy-of select="@*"/>
> <xsl:for-each-group group-adjacent="@class='Listitem'" select="*">
> <xsl:choose>
> <xsl:when test="self::par[@class='Listitem']">
> <list>
> <head><xsl:apply-templates
> select="preceding-sibling::par[1]/node()"/></head>
> <xsl:apply-templates select="current-group()"/>
> </list>
> </xsl:when>
> <xsl:otherwise>
> <xsl:apply-templates select="current-group()"/>
> </xsl:otherwise>
> </xsl:choose>
> </xsl:for-each-group>
> </xsl:copy>
> </xsl:template>
> 
> <xsl:template match="par[@class='Listbegin']"/>
> 
> 
> </xsl:stylesheet>
> 
> 
> 
> $ saxon8 list.xml list.xsl
> <?xml version="1.0" encoding="UTF-8"?>
> <sect>
>    <foo/>
>    <xyz/>
>    <xyz/>
>    <list>
>       <head>Fruit</head>
>       <par class="Listitem">Apple</par>
>       <par class="Listitem">Orange</par>
>       <par class="Listitem">Pear</par>
>    </list>
>    <list>
>       <head>Colours</head>
>       <par class="Listitem">Red</par>
>       <par class="Listitem">Green</par>
>       <par class="Listitem">Blue</par>
>    </list>
>    <xyz/>
>    <bar/>
>    <list>
>       <head>Fruit</head>
>       <par class="Listitem">Apple</par>
>       <par class="Listitem">Orange</par>
>       <par class="Listitem">Pear</par>
>    </list>
> </sect>
> 
> ________________________________________________________________________
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