At 2009-10-31 15:51 -0700, Mark Wilson wrote:
>I was not careful in the way I described this problem. Each group 
>consists of a single title with one or more citations. What I must 
>have said is that I wanted to set the Title in each group to "keep". 
>What I *should* have said was, I want to set the only the first 
>group to "keep". For the input data at the end of this email, that 
>would be the title "Further observations".

Is it a co-incidence that it is alphabetically the first and 
positioned as first?  I'm assuming because of your use of <xsl:sort> 
that the alphabetical order is important in the determination of first.

>All the rest would not be marked "keep".

Then I would have worded your request "the first of the sorted 
population" not "the first of the group".

>Clearly, I do not want (from listing 1):
>                    <xsl:if test="position()=1">
>                        <xsl:attribute 
> name="keep-with-previous">always</xsl:attribute>
>                    </xsl:if>

It wasn't clear to me because you were grouping articles and asked 
for the first of the group.  I believe Martin interpreted it the same way.

I now understand you were grouping the population of articles and 
need a keep on the first of the sorted population.

>However, I do not know XPath well. How do I select only the first 
>group for marking and let the other groups pass without marking them?

   <xsl:for-each-group select="...population...">
     <xsl:sort .../>
     <xsl:sort .../>
     <xsl:sort .../>
     <xsl:variable name="group-position" select="position()"/>
     <xsl:for-each select="current-group()">
        <fo:table-row>
           <xsl:if test="position()=1 and $group-position=1">
              <!--then at the very first of the sorted population-->
              <xsl:attribute name="keep-with-previous">.....

I hope this helps.

. . . . . . . . . . . . . Ken


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