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| Quantity | 452 | 何かの数や量の任意の仕様。 それに応じて、 二つの Quantity のサブクラスがある：Number (数)と PhysicalQuantity (量)。 | ^ |
| PhysicalDimension | 11 | A physical dimension such as length, mass, force etc. | ^ |
| Length | . | As with length, this is the measure of an Object along its longest span. | ^ |
| Velocity | . | PhysicalDimension of velocity, [m/s]. | ^ |
| Force | . | PhysicalDimension of force, [N]. | ^ |
| AngularVelocity | . | PhysicalDimension of angular velocity, [s^-1]. | ^ |
| Torque | . | PhysicalDimension of torque, [N/m]. | ^ |
| Voltage | . | PhysicalDimension of voltage, [V]. | ^ |
| Current | . | PhysicalDimension of electrical current, [A]. | ^ |
| Pressure | . | PhysicalDimension of pressure, [Pa],[N.m^-2]. | ^ |
| VolumeFlow | . | PhysicalDimension of volume flow, [m^-3]. | ^ |
| Power | . | PhysicalDimension of power, [W]. | ^ |
| Dimensionless | . | Dimensionless PhysicalDimension. | ^ |
