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Entity > Abstract > Quantity > PhysicalQuantity > ConstantQuantity > TimeMeasure > TimeDuration > YearDuration

YearDuration
subject			fact

YearDuration	documentation Time unit. one calendar year. 1 year = 365 days = 31536000 seconds
	has axiom (=> (instance ?YEAR Year) (duration ?YEAR YearDuration))
	has axiom (equal (MeasureFn ?NUMBER YearDuration) (MeasureFn (MultiplicationFn ?NUMBER 365) DayDuration))
	is an instance of TimeDuration
	is an instance of UnitOfMeasure
TimeDuration	is second domain of age
	is second domain of duration
	is second domain of frequency
UnitOfMeasure	is second domain of MeasureFn
PhysicalQuantity	is partitioned into ConstantQuantity, FunctionQuantity
ConstantQuantity	is first domain of MagnitudeFn
Quantity	is first domain of AdditionFn
	is first domain of DivisionFn
	is first domain of ExponentiationFn
	is first domain of greaterThan
	is first domain of greaterThanOrEqualTo
	is first domain of lessThan
	is first domain of lessThanOrEqualTo
	is first domain of MaxFn
	is first domain of MinFn
	is first domain of MultiplicationFn
	is first domain of ReciprocalFn
	is first domain of RemainderFn
	is first domain of RoundFn
	is first domain of SubtractionFn
Abstract	is disjoint from Physical

Next TimeDuration: DayDuration    Up: TimeDuration, UnitOfMeasure    Previous TimeDuration: SecondDuration