index-of

The index-of() function returns a sequence of integers indicating the positions within a particular sequence where items equal to a specified value occur.

For example, «index-of(("a", "b", "c"), "b") » returns 2 .

Argument	Data Type	Meaning
sequence	xdt:anyAtomicType*	The sequence to be searched
value	xdt:anyAtomicType	The value to be found
collation (optional)	xs:string	The collation to be used when comparing strings
Result	xs:integer*	A list containing the positions within the supplied sequence where items that are equal to the specified value have been found