What is XPath?
XPath is a major element in XSLT the standard.
XPath can be used to navigate through elements and attributes in an XML document.
XPath Path Expressions
XPath uses path expressions to select nodes or node-sets in an XML document.
These path expressions look very much like the expressions you use with a traditional computer file system:
XPath Standard Functions
XPath includes over 100 built-in functions.
There are functions for string values, numeric values, booleans, date and time comparison, node manipulation, sequence manipulation, and much more.
XPath is Used in XSLT
XPath is a major element in the XSLT standard.
With XPath knowledge you will be able to take great advantage of your XSLT knowledges.
XPath is a W3C Recommendation
XPath became a W3C Recommendation 16. November 1999.