Suppose the children of the context node are elements named A to Z.

Then I declare a variable

<xsl:variable name="alpha" select="A|B|C|D"/>

Now i want to match on the complement of alpha.

Can I say

<xsl:template match="* except $alpha"/>

or
<xsl:template match="*[not $alpha]"/>

________________________________________________________________________
The Numerical Algorithms Group Ltd is a company registered in England
and Wales with company number 1249803. The registered office is:
Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom.