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Muenchian method, and keys 'n stuff
- From: DPawson at rnib dot org dot uk
- To: xsl-list at lists dot mulberrytech dot com
- Date: Tue, 22 Jan 2002 12:56:15 -0000
- Subject: [xsl] Muenchian method, and keys 'n stuff
- Reply-to: xsl-list at lists dot mulberrytech dot com
so far so good, but I'm missing a bit.
Source XML is a series of grouped records
<doc>
<adventure>
<r>
<Ra>
<lett>a</lett>
<au>Ashley, Bernard. </au>
</Ra>
</r>
multiple r records.
output requirement is to report, for each group (adventure)
all Authors beginning with, or (the hard bit)
to state
<p>There are no authors beginning with X </p>
stylesheet is:
<xsl:variable name="u" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'"/>
<xsl:variable name="l" select="'abcdefghijklmnopqrstuvwxyz'"/>
<xsl:key name="auth"
match="r"
use="Ra/lett"/>
<xsl:template match="adventure">
<h1>Adventure</h1>
<!-- <xsl:for-each select="//l:letters/n">-->
<xsl:apply-templates select="r[generate-id(.)=
generate-id(key('auth',Ra/lett)[1])]"/>
</xsl:template>
Then for each r
<xsl:template match="r">
<xsl:variable name="thisAu" select="Ra/au"/>
<h2>The letter <xsl:value-of select="translate(Ra/lett, $l,$u)"/> </h2>
<h3><xsl:value-of select="Ra/au"/></h3>
other stuff
<xsl:apply-templates select="following-sibling::r[Ra/au = $thisAu ]"
mode="others"/>
</xsl:template>
Which does the job for those records that *are* there.
I had to remove a for-each over an alphabet, because the contexts
were screwing me up. that was nice, I could call up each letter in turn...
but my brain gave up at that point.
I now have
<l:letters xmlns:l="local">
<n>a</n>
<n>b</n>
<n>c</n>
<n>d</n>
<n>e</n>
<n>f</n>
<n>g</n>
...
in the source document (its part 3 of a chain), to keep the key context
right,
but I can't figure out a way of iterating over an alphabet,
and processing the records to 'announce' the missing letters (i.e. no books
beginning with that letter)
Any help appreciated.
Regards DaveP
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