XPath Standard Functions
XPath includes over 200 built-in functions.
There are functions for string values, numeric values, booleans, date and time comparison, node manipulation, sequence manipulation, and much more.
Today XPath expressions can also be used in JavaScript, Java, XML Schema, PHP, Python, C and C++, and lots of other languages.
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 knowledge.
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