Re: [xsl] grouping + global variable (?) (was re: regexs, grouping (?) and XSLT2?)

[Bruce D'Arcus <bdarcus@xxxxxxxxxxxxx>]

On Aug 12, 2004, at 6:13 PM, Michael Kay wrote:

> > How am I generating this "copy", in other words?  Should I, for
> > example, be using the new temporary tree functionality? Within the
> > context of a variable?  Something else?
>
> Basically:
>
> <xsl:template match="/">
>   <xsl:variable name="temp">
>     <xsl:apply-templates select="." mode="phase-1"
>   </xsl:variable>
>   <xsl:apply-templates select="$temp" mode="phase-2"/>
> </xsl:template>
>
> So you're doing a two-phase transformation, with $temp holding the
> output of
> the first phase, which acts as the input to the second phase. You
> don't have
> to use different modes, but it makes things clearer.

Since the bibliography is only part of the document, and in a separate
namespace, I decided to create a virtual copy of the
mods:modsCollection element in the phase-1 mode, and then to
apply-templates on that in the default mode; like so:

<xsl:template match="mods:modsCollection">
  <xsl:variable name="temp">
    <xsl:apply-templates select="." mode="phase-1"/>
  </xsl:variable>
  <xsl:apply-templates select="$temp"/>
</xsl:template>

<xsl:template match="mods:modsCollection">
  <xsl:copy>
    <xsl:copy-of select="@*"/>
    <xsl:apply-templates mode="phase-1"/>
  </xsl:copy>
</xsl:template>

<xsl:template match="mods:mods" mode="phase-1">
  <xsl:copy>
    <xsl:copy-of select="*|@*"/>
    <xsl:variable name="bibref" select="mods:mods" />
    <xsl:for-each-group select="$bibref"
group-by="mods:grouping-key(.)">
      <xsl:sort select="current-grouping-key()"/>
      <xsl:for-each-group select="current-group()"

group-by="xs:integer(substring(mods:originInfo/mods:dateIssued,1,4))">
	<xsl:sort select="current-grouping-key()" />
	<xsl:variable name="year" as="xs:integer"
		select="current-grouping-key()"/>
	<xsl:variable name="first" as="xs:boolean" select="position() = 1" />
	<xsl:for-each select="current-group()">
	  <xsl:attribute name="id">
	    <xsl:value-of select="@ID"/>
	  </xsl:attribute>
	  <key type="creator">
	    <xsl:value-of select="$creator-before"/>
	    <xsl:choose>
	      <xsl:when test="$first and position()=1">
		<xsl:apply-templates select="." mode="names"/>
		<xsl:text> </xsl:text>
	      </xsl:when>
	      <xsl:otherwise>.</xsl:otherwise>
	    </xsl:choose>
	    <xsl:value-of select="$creator-after"/>
	  </key>
	  <key type="year">
	    <xsl:value-of select="$year" />
	    <xsl:if test="last() > 1">
	      <xsl:number value="position()" format="a"/>
	    </xsl:if>
	  </key>
	</xsl:for-each>
      </xsl:for-each-group>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

My problem is I can't access the generated year, which should be of the
form:

	<mods:key type="year">1999a</mods:key>.

I have a feeling this means something's gone wrong with this
intermediate step, as if I apply-templates to "mods:key" within the
default mode of mods:modsCollection, I get no output.  Everything but
the year gets rendered correctly.

Is there something obviously wrong with the above?  Maybe the way I've
generated the copy?  I thought it might be a namespace problem, but
that's not it.

Bruce