Using XSLT

Look at http://www.ils.unc.edu/courses/2007_fall/inls890_126/syllabus.xsl for some pointers. This is taking a TEI document, but the first template at least, and some of the logic will be of help.

Dave Pawson's XSLT FAQ is very helpful in finding the solutions to your problems.

The Atom source file uses namespaces, so you should declare a namespace that matches the one in the source file, and map it to a prefix that you'll use in every XPath you use to query the source.