OSID - osid.calendaring.DateTimeInterval Service Interface Definition

Interface	osid.calendaring.DateTimeInterval
Description	The `DateTimeInterval` interface defines an interval between two date times.
Method	getStart
Description	Gets the starting time for this interval.
Return	`osid.calendaring.DateTime`	the starting time
Compliance	`mandatory`	This method must be implemented.
Method	getEnd
Description	Gets the ending time for this interval. The ending time is greater than or equal to the starting time.
Return	`osid.calendaring.DateTime`	the ending time
Compliance	`mandatory`	This method must be implemented.