I understand that like many functional languages (e.g. Lisp) XSLT evaluation is performed lazily.

In DP specifically is there a way to force evaluation?

For example, compare:

A: <xsl:variable name="var" select="[some expression]" />

with:

B:
<xsl:variable name="var">
   <xsl:copy-of select="[some expression]" />
</xsl:variable>

Will B force evaluation such that subsequent access to $var will not cause the expression to be re-evaluated?

Thanks,

Faisal