How an XSLT processor works

http://www.ibm.com/developerworks/xml/library/x-xslang/
In this article, Benoît Marchal examines how an XSLT processor works. To demonstrate his point, he codes a special stylesheet that makes some aspects of the processing more visible. He pays special attention to the recursive nature of XSLT coding. A good understanding of the XSLT processor will help you be a more productive XSLT programmer....check it out!