> Not quite, I think.  I was thinking of the case where $nodes is
> of type node-set, but $variable would be a string.

but that case would presumably follow as the / operator takes
a node set on the left and an xpath expression on the right so you'd
presumably (?) be able to do
 
<xsl:variable name="newset" select="$nodes/some/saxon:evaluate($variable)"/>


David


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