How you define functions in XSLT

How you define functions in XSLT?

Answer:

XSLT has more than 100 build-in functions.This functions are made for string values,date and time comparison,numeric values,sequence manipulation, Node and QName and boolean variable etc. We can find out the XSLT function namespace from http://www.w3.org/2005/02/xpath-functions I have given you some XSLT build-in functions. current(),document(),element-variable(),function-variable(),key,gererated-id() etc.