The first is selecting something using a variable and then applying
templates to that variable, eg:
<xsl:apply-templates select="$sections/section"/>
Why is this annoying? (I do it all the time:-) if the xpath to select
$sections is big and complicated and you need to query into it multiple
times then you either need to use a variable, or trust your system's
optimiser to implictly cache the result of the expression the first time
you use it.
David
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