IBM BPM, V8.0.1, All platforms > Authoring services in Integration Designer > Defining and transforming data > Transforming data > Transforming data using XML maps > Functions and transforms > IBM supplied transform types
XML Transform: Group
Takes a single list as input and creates a number of lists. It is used to map a "flat" repeatable structure (an array) to a nested repeatable structure (a nested array) based on some criteria from the input structure.
Example
An input array of complex type Employee contains a number of elements including Department. The output array is of complex type Department and contains a nested array Employee. A Group transform based on Employee/Department can be used to take the list of employees from the input and group these employees by department in the output array.