Re: [xsl] How to get a case insensetive grouping ??

[Joerg Pietschmann <joerg dot pietschmann at zkb dot ch>]

Well, there is a general rule for using keys.

"The value used for looking up stuff via a key should be
fiddled with the same way as in the key definition"

Some examples:
Normalizing space:
 <xsl:key name="n-stuff" match="stuff"
   use="normalize-space(.)"/>
use
     select="key('n-stuff',normalize-space($val))"

Transforming characters:
 <xsl:key name="t-stuff" match="stuff"
   use="translate(.,$up,$lo)"/>
use
     select="key('t-stuff',translate($keyval,$up,$lo))"

A composite key value:
 <xsl:key name="l" match="locale"
   use="concat(country,'_',language)"/>
use
     select="key('l',concat($c,'_',$l))"

The rule is particularly important when using keys for Munchean
grouping, because the values for lookup come from the source
XML and cannot be supposed to be already in a proper form.

Unfortunately, this rule is not in any of the FAQs, and even
if it were, those in need to be reminded would hardly look for
it.

Regards
J.Pietschmann

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