I've created a simple XPath library in Squeak, as I needed the 
functionality for another project I am working on.  From the package 
description:

A basic XPath library for Squeak, leveraging the XML parsing 
capabilities now included in the full image.  Modifies XMLNode to 
better support XPath.  Handles basic XPath locator expressions for 
elements and attributes; returns a collection of XMLNodes matching the 
expression, if any.

Unit tests are included in the package, and all run successful both in 
my working image and a fresh 3.6 full image after installing from 
SqueakMap.

Any problems or questions, let me know.  At last, I've contributed to 
Squeak! :)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 714 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20031013/08a12739/attachment.bin