This operator can be used to select one element from a window of elements.
- method (String): The method that should be used for selection
- FIRST: The first element in the window
- LAST: The last element in the window
- MIN: The element with a minimal value
- MAX: The element with a maximal value
- attribute (SDFAttribute): For some methods this states the attribute for which the element should be selected.
Remark: The input must contain end time stamps, else no output will ever be produced!