I've got this in a template:
<xsl:for-each-group select="mb3e:document"
group-by="mb3e:fam_id">
<xsl:sort select="mb3e:prim_sort_key"/>
<xsl:variable name="first-structured-number"
select="esd:structured-number(current-group()[1])"/>
<xsl:apply-templates mode="mil" select="current-group()">
<xsl:with-param name="family-structured-number"
select="$first-structured-number"/>
<xsl:sort select="mb3e:date_list/mb3e:date[(_at_)type='PUBL']"
order="descending"/>
</xsl:apply-templates>
</xsl:for-each-group>
The esd:structured-number function is slow, so I only want to call it
once per group. Actually, the template that is applied within the
xsl:for-each-group instruction has to call it for each mb3e:document
element, but I want to avoid calling it more than once for
any of those
elements (including the first, i.e. most recent):
I'm not sure what you mean by "the most recent document". current-group()[1]
selects the first item in the group currently being processed. You haven't
really shown enough of your source data for me to understand what you are
doing.
<xsl:variable name="structured-number"
select="if (position() = 1)
then $family-structured-number
else esd:structured-number(.)"/>
Where is this variable declared, and where is it used? The reference to
position() makes it highly context-sensitive.
I think this works most of the time, but sometimes the
family-structured-number parameter value (i.e.
$first-structured-number)
is not the value that would be returned if the esd:structured-number
function were called on the most recent mb3e:document element in the
group. For example, in once case it was the 7th most recent
of a group of 58.
As I say, I don't understand what you mean by "most recent", and I don't see
anything in your code that relates to the concept. You seem to be basing the
calculation on the first item in the current group.
Michael Kay
http://www.saxonica.com/
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