On Aug 17, 2004, at 10:26 AM, Jeni Tennison wrote:
Since the current element is a <mods:mods> element,
the test is guaranteed to be true.
What you want is simply:
<xsl:if test="position() = 1">
...
</xsl:if>
This tests whether the current <mods:mods> element is the first within
the group of <mods:mods> elements that you're looking at.
For whatever reason, this doesn't work for me. I originally had that
statement, but couldn't get it to work. That's why I ended up with the
one I posted. Here's the template again (the key is declared at the
top of the stylesheet, and also used in the bibliography mode):
<xsl:template match="db:biblioref">
<xsl:variable name="idref" select="@linkend"/>
<xsl:variable name="bibref" select="key('bibref', $idref)" />
<xsl:for-each-group select="$bibref" group-by="bib:grouping-key(.)">
<xsl:sort select="current-grouping-key()"/>
<xsl:for-each-group select="current-group()"
group-by="xs:integer(mods:year)">
<xsl:sort select="current-grouping-key()"/>
<xsl:for-each select="current-group()">
<a href="#{(_at_)ID}" xmlns="http://www.w3.org/1999/xhtml";>
<!-- PROBLEM: need to collapse like (Doe, 1999a, c), but this won't
work. -->
<xsl:if test="position() = 1">
<xsl:apply-templates select="mods:name" mode="citation"/>
<xsl:text>, </xsl:text>
<xsl:value-of select="mods:year"/>
</xsl:if>
<xsl:apply-templates select="mods:key"/>
<xsl:if test="position() != last()">, </xsl:if>
</a>
</xsl:for-each>
</xsl:for-each-group>
</xsl:for-each-group>
<xsl:if test="position() != last()">; </xsl:if>
</xsl:template>
Declare it like:
<xsl:key name="mods" match="mods:mods" use="@ID" />
and use it like:
<xsl:variable name="bibref" select="key('mods', $idref)" />
Keys are much faster and neater than searching through the entire
document using a predicate.
I was wondering about using keys. Do you think it'd be better to do
this the other way around, though, and have a key for all the
biblioref/@linkend values (the actual docbook citations), and when I
process the mods:mods records, call those? Wouldn't that ensure that
only those records that contain a biblioref element with their ID
linkend actually get processed? Of course, I may have multiple
linkends for the same record ID.
A related question: is there anywhere else obvious I ought to be
drawing on keys? For example, this business of creating conditional
formatting using grouping (the Doe, 1999a, b stuff) is quite processing
intensive (at least as I have it in my stylesheet). For both the
bibliography and the citations, I have to group and sort (often
multiple times), and then figure out how to format based on position in
the group. Is there some smarter, less processing-intensive, way to do
this using keys?
Bruce