Returns the number of individual items making up the input sequence. The count of an empty set is zero.
Built-in, C++, C#, Java, XQuery, XSLT 1.0, XSLT 2.0, XSLT 3.0.
Note that this function has limited functionality in XSLT 1.0.
Optional argument. Supplies the parent context. See also Example: Changing the Parent Context.
The parent-context argument is an optional argument in some MapForce core aggregation functions (e.g., min, max, avg, count). In a source component which has multiple hierarchical sequences, the parent context determines the set of nodes on which the function should operate.
This argument must be connected to the source item to be counted.