73. The method of claim 72 , wherein said operator for executing the XPath built-in function performs a string function.
73. The method of claim 72 , wherein said operator for executing the XPath built-in function performs a string function. 74. The method of claim 73 , wherein said string function comprises one or more of a tolowerO function, a toupper( )function, a normalize-space( )function, and a concat( )function.