SWEET Ontology
type: Ontology
version info: 2.3
imports: procPhysical.owl
imports: prop.owl
imports: propQuantity.owl
imports: propMass.owl
imports: reprMathOperation.owl
imports: propTimeFrequency.owl
imports: reprSpaceDirection.owl
imports: propSpaceDistance.owl
imports: propSpaceMultidimensional.owl
imports: reprSciUnits.owl
imports: relaSpace.owl
imports: relaSci.owl
imports: relaMath.owl
imports: rela.owl

Pressure
type: Class
subclass of: IntensiveProperty
subclass of: Ratio
subclass of: Restriction
  has value: pascal
  on property: hasDefaultUnit
subclass of: Restriction
  on property: hasFirstOperand
  all values from: Force
subclass of: Restriction
  on property: hasSecondOperand
  all values from: Area
comment: Force per unit area.

PartialPressure
type: Class
subclass of: Pressure
comment: The pressure that a component of a gaseous mixture would have if it alone occupied the same volume at the same temperature as the mixture.

PressureGradient
type: Class
subclass of: Gradient
subclass of: PhysicalQuantity
subclass of: Restriction
  all values from: Pressure
  on property: isDerivativeOf
subclass of: Restriction
  all values from: Distance
  on property: derivativeWithRespectTo
comment: The derivative of pressure

BarometricPressure
type: Class
equivalent class: AirPressure
equivalent class: AtmosphericPressure
subclass of: Pressure
comment: The pressure exerted by the atmosphere as a consequence of gravitational attraction exerted upon the column of air lying directly above the point in question.

BarometricTendency
type: Class
subclass of: PressureTendency
comment: The character and amount of atmospheric pressure change during a specified period of time, often a three-hour period preceding an observation.

SeaLevelPressure
type: Class
subclass of: AtmosphericPressure
comment: The atmospheric pressure at mean sea level, either directly measured or, most commonly, empirically determined from the observed station pressure.

PressureTendency
type: Class
subclass of: Tendency
subclass of: Restriction
  on property: hasProperty
  all values from: Pressure
comment: The character and amount of atmospheric pressure change during a specified period of time, often a three-hour period preceding an observation.