Re: [xsl] for-each-group for multiple nodes

["C. M. Sperberg-McQueen" <cmsmcq@xxxxxxxxxxxxxxxxx>]

On 17 Jul 2009, at 03:36 , Ramkumar wrote:

> ...
> I am not able to achieve my expected output through for-each-group for
> multiple nodes in a single template match. Please look into my  
> detailed
> inputs and find mistakes in my below code.
> ...
> xslt
> =====
> ...
>
> <xsl:template match="book">
> <book>
>  <xsl:for-each-group select="*"
> group-starting-with="para[contains(@aid:pstyle,'Level')]">

If the sample input you showed is typical, this is equivalent
to

  <xsl:for-each-group select="*" group-starting-with="para"/>

I think that since you want each LevelF para to generate a
distinct qandaset element in the output, you might think
about whether you really want a distinct group for every
para, or just a distinct group for every sequence of elements
beginning with para aid:pstyle="LevelF".



>   <xsl:choose>
> 	    <xsl:when test="self::para/@aid:pstyle[contains(.,'LevelF')]">
> 	     <qandaset>
> 	      <xsl:call-template name="g">
> 	       <xsl:with-param name="e" select="current-group()"/>
> 	      </xsl:call-template>
> 	     </qandaset>
> 	    </xsl:when>

The code above seems to expect that the current-group()
will contain the following LevelM and LevelM_sub para elements.
It won't:  each time the input contains a new para element
with contains(@aid:pstyle,'Level'), a new group will be
started.  So your Level M paragraphs and their subordinate
parts will be in the next group, not this one.

As a first step, try to get the outermost grouping to work;
don't worry about the inner groupings.  Since you want
each LevelF paragraph to produce an element containing its
following siblings up to but not including the next level
F paragraph, you want a grouping based on the LevelF value,
not on the string 'Level'.

Within those groups, you may want to make use of recursive
groupings for Level M.

I hope this helps; if it does not help sufficiently, please ask
again.

Michael Sperberg-McQueen

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