Jeni's Musings

It’s probably worth recording here the comment that Mike made on the xsl-list thread, that using such a regex efficiently relies on the XSLT processor recognising that the variable reference is a compile-time constant and so compiling the regular expression at (XSLT) compile time. Of course if enough users do this anyway the XSLT implementors will probably feel motivated to making their processors support these idioms….

Davide