Probably this would be faster?
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>
<xsl:key name="kComDesc" match="h1|p|b|i"
use="exists(ancestor::Comments[1])"/>
<xsl:template match="key('kComDesc', 'true')">
Whatever processing here
</xsl:template>
</xsl:stylesheet>
Yes, that would probably work reasonably well (and it's nice to find a
plausible use case for using key() in a pattern). One point to be careful
about though: if the "use" value is a boolean, the second parameter of key()
should also be a boolean, so it should be key('kComDesc', true()). There's
no implicit casting in 2.0, and non-comparable values are treated as not
matching, so you can get some hard-to-diagnose errors in this area.
The "[1]" suggests you don't have much confidence in your product's
optimizer...
Michael Kay
http://www.saxonica.com/
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