Book excerpt: In this book, leading XML developer Lars Marius Garshol covers every essential aspect of XML programming, from basic principles through advanced techniques, utilizing DOM, SAX, XSLT, XPath, schemas, and other key XML standards. Garshol presents scores of code examples based on Python, a cross-platform language that is exceptionally well suited for XML development. Garshol also presents new insights into XML application design and optimization, as well as complete sample applications Book jacket.