ben senior writes:
> We're using XSL to generate PHP code. Given a particular irregularity in 
> the incoming XML (a missing attribute) we would like to output a PHP 
> line (to throw an exception) and then to STOP the processing then and 
> there (match nothing more and end) but without the processing 'crashing'.
> 
> I've looked through my XSL books but not come up with anything...

What about

<xsl:if test="@foo">
  <xsl:message terminate="yes">Missing 'foo' attribute</xsl:message>
</xsl:if>

-- 
Kevin Rodgers