Relevant Links

Document Object Model

Wikipedia article

XPath

Wikipedia article (a query language for extracting specific nodes from XML)

Expat

Wikipedia article (fast C-based low-level parser)

SAX (Simple API for XML)

Wikipedia article (low-level event-driven parser)

Document Type Definition

Wikipedia article

XSL Transformations

Wikipedia article (a language for transforming XML data)

Python & XML

A good book from O'Reilly

Uche Ogbuji

A prolific writing on XML and Python, co-author of some popular Python code for working with XML

Amara XML Toolkit Manual

A 3rd party toolkit for "Pythonic" XML parsing

13.6 xml.dom

Python Library documentation

13.6.2.2 Node Objects

Python Library documentation

13.6.2.3 NodeList Objects

Python Library documentation

13.6.2.5 Document Objects

Python Library documentation

13.6.2.6 Element Objects

Python Library documentation

13.6.2.7 Attr Objects

Python Library documentation

13.6.2.8 NamedNodeMap Objects

Python Library documentation