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.
This is a nice collection of useful XSLT transforms, models and reusable fragments under GPL, involving HTML tables, XML Schema, HTML GUI, MathML, SQL analogy, etc. This has been developped as part of the "Worlwide Botanical Knowledge Base" project, ( htt