Stephan Schmidt has posted information today about a tutorial he'd previously written for the Zend website concerning his XML_Parser PEAR package he maintains, but never saw publication on Zend's site.
This tutorial was supposed to be published in the PEAR section of Zend's developer zone, as they planned on sponsoring PEAR developers that were willing to write tutorials for their packages. Sadly enough this tutorial has never been published, although Zend promised me to do so.
When cleaning up my hard disk yesterday, I stumbled across the tutorial and decided, that it would probably be better to publish it on my own website instead of waiting for Zend to finally put it online. So if you still are using PHP4 or prefer SAX-based parsing although PHP5 offers a decent DOM implementation, you can now find the XML_Parser tutorial on my website.
You can head directly over to the tutorial via this link to read up on this great package.