SWEET Ontology
type: Ontology
version info: 2.3
imports: reprMathOperation.owl
imports: relaMath.owl
imports: relaSci.owl
imports: rela.owl
imports: prop.owl
imports: propQuantity.owl
imports: statePhysical.owl
imports: propSpaceMultidimensional.owl
imports: reprSciUnits.owl

Density
type: Class
subclass of: IntensiveProperty
subclass of: Restriction
  has value: kilogramPerMeterCubed
  on property: hasDefaultUnit
comment: 1. The ratio of the mass of any substance to the volume occupied by it (usually expressed in kilograms per cubic meter, but any other unit system may be used); the reciprocal of specific volume.

SpecificVolume
type: Class
subclass of: IntensiveProperty
subclass of: Restriction
  has value: meterCubedPerKilogram
  on property: hasDefaultUnit
comment: 1. The ratio of the mass of any substance to the volume occupied by it (usually expressed in kilograms per cubic meter, but any other unit system may be used); the reciprocal of specific volume.

PotentialDensity
type: Class
subclass of: Density
comment: The density of a unit of water after it is raised by an adiabatic process to the surface, i.e., determined from in-situ salinity and potential temperature (AGI, 1980). Density that would be reached by a compressible fluid if it were adiabatically compressed or expanded to a standard pressure.

OpticalMass
type: Class
subclass of: RadiationMediumInteractionQuantity
subclass of: Restriction
  has value: kilogram
  on property: hasDefaultUnit
comment: The vertical integral of the density of absorbers between two altitudes; used mainly in determining the transmission through an absorbing gas.