I'm currently using keys with Xalan to group course-data by week of the year.
<xsl:key name="WosNachWoche" match="//KURS[VERANART='Wochenendseminar' and
not(AUSFALL)]"
use="datetime:weekInYear(BEGINNDAT))" />
Now I need to enhance grouping to work with courses from different
years, so I figured I'd just need to extend the use-term like this:
<xsl:key name="WosNachWoche" match="//KURS[VERANART='Wochenendseminar' and
not(AUSFALL)]"
use="concat(datetime:weekInYear(BEGINNDAT),':',datetime:formatDate(BEGINNDAT,'y'))"
/>
Unfortunately this isn't working for some reason I don't understand.
For quick testing I use this template
<xsl:template match="/">
<xsl:for-each select="key('WosNachWoche',//*)">
<xsl:message>
<xsl:value-of select="TITELKURZ"/>
</xsl:message>
</xsl:for-each>
</xsl:template>
and found that the second use-term gives me NO results. Exploring
further it seems like as soon as I use concat in the use-expression I
stop getting any results.
Any ideas? What is the problem and how can I assemble a key with
weeknumber and year?
Thanks for any help,
Ferdinand Soethe
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