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Entity > Abstract > Quantity > PhysicalQuantity > ConstantQuantity > LengthMeasure > Foot
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Foot comparison table
Subject be first domain of be second domain of documentation have axiom be third domain of is a kind of is an instance of
LengthMeasureMagnitudeFnlengthThe Class of ConstantQuantities relating to length
(=>
    (larger ?OBJ1 ?OBJ2)
    (forall (?QUANT1 ?QUANT2)
       (=>
          (and
             (measure ?OBJ1 (MeasureFn ?QUANT1 LengthMeasure))
             (measure ?OBJ2 (MeasureFn ?QUANT2 LengthMeasure)))
          (greaterThan ?QUANT1 ?QUANT2))))
distanceConstantQuantity 
UnitOfMeasureSubtractionFnMeasureFnA standard of measurement for some dimension. For example, the Meter is a UnitOfMeasure for the dimension of length, as is the Inch. There is no intrisic property of a UnitOfMeasure that makes it primitive or fundamental; rather, a system-of-units (e.g. SystemeInternationalUnit) defines a set of orthogonal dimensions and assigns units for each
(=>
    (and
       (instance ?REL RelationExtendedToQuantities)
       (instance ?REL BinaryRelation)
       (instance ?NUMBER1 RealNumber)
       (instance ?NUMBER2 RealNumber)
       (holds ?REL ?NUMBER1 ?NUMBER2))
    (forall (?UNIT)
       (=>
          (instance ?UNIT UnitOfMeasure)
          (holds ?REL (MeasureFn ?NUMBER1 ?UNIT) (MeasureFn ?NUMBER2 ?UNIT)))))
 PhysicalQuantity 
FootMagnitudeFnMeasureFnEnglish length unit of feet
(equal
         (MeasureFn ?NUMBER Foot)
         (MeasureFn (MultiplicationFn ?NUMBER 0.3048) Meter))
distance UnitOfMeasure

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