L.4.15.6.1.9 Function Type

The simple type ST_FunctionType defines different types of conditional expressions that can be utilized. The different types of expressions are:

cnt – Specifies the count of items. pos - Retrieves the position of the node in the specified set of nodes. revPos - Reverse position function. posEven - Returns 1 if the specified node is at an even numbered position in the data model. posOdd - Returns 1 if the specified node is in an odd position in the data model. var - Used to reference a variable. depth - Specifies the depth of items.

maxDepth - Defines the maximum depth of items.