ycoon is a Python WSGI web development framework which allows XML processing pipelines to handle HTTP requests based on URI pattern matching. It is similar in intention to the Apache Cocoon framework. Pycoon uses sitemap file format compatible with Apache Cocoon Sitemap
The TEIViewer is a browser-based application built on a modification of the XHTML branch of the Text Encoding Initiative XSL stylesheet family and the jQuery JavaScript Library.
The eXtensible Text Framework (XTF) is a powerful open source platform for providing access to digital content. Developed and maintained by the California Digital Library (CDL), XTF functions as the primary access technology for the CDL’s digital collections and other digital projects worldwide.
XTF consists of Java and XSLT 2.0 code that indexes, queries, and displays digital objects
XPath is used to navigate through elements and attributes in an XML document. XPath is a major element in W3C's XSLT standard - and XQuery and XPointer are both built on XPath expressions.