OSID - osid.mapping.Speed Service Interface Definition

Interface	osid.mapping.Speed
Implements	`osid.OsidPrimitive`
Used By	`osid.Metadata`
	`osid.configuration.Value`
	`osid.mapping.path.PathTravelSession`
	`osid.mapping.path.ResourceVelocity`
	`osid.mapping.path.SpeedZone`
	`osid.search.terms.SpeedRangeTerm`
	`osid.search.terms.SpeedTerm`
Description	A speed is a distance traveled over a unit of time.
Method	getDistance
Description	Gets the distance.
Return	`osid.mapping.Distance`	the distance
Compliance	`mandatory`	This method must be implemented.
Method	getTimeUnit
Description	Gets the time unit.
Return	`osid.calendaring.DateTimeResolution`	the time unit
Compliance	`mandatory`	This method must be implemented.