It's not about the lxml devs. The XPath compiler and engine are implemented by libxml2 and allow you to define your own XPath functions and even replace existing ones.

Ahh, that's what I didn't know. From reading the lxml docs, behavior in libxml2 is not considered a lxml bug. That's why I came to this mailing list: for clarification. :-) Thanks, both of you! -- "The first step in confirming there is a bug in someone else's work is confirming there are no bugs in your own." -- Alexander J. Vincent, June 30, 2001