difference() Operation

Syntax	NONE `set aDuration = dateTime1.difference(dateTime2)`
Semantics	`difference()` calculates the difference between two DateTime objects. The result is an object of type DurationStructure. Symbolically: `duration = dateTime1 - dateTime2`
Substitutables	`dateTime`	Can be any variable or object attribute having the type DateTime.
Substitutables	`duration`	The resulting Base Components::Basic Behavior::DateTime::DurationStructure object.
Examples	NONE `create duration; set duration = dateTime1.difference(dateTime2);`