Unit Ontology (primitive)
type: Ontology
language: en
publisher: Dumontier Lab
description: An ontology of measurement units.
version info: 2.0
format: application/rdf+xml
date: 2007-10-01
creator: Mykola Konyk
imports: annotation.owl

absorbed dose rate unit
type: Class
comment: A standard measure for the absorbed dose rate.
subclass of: radiation unit

radiation unit
type: Class
comment: A standard measure of radiation.
subclass of: unit

absorbed dose unit
type: Class
comment: A standard measure for absorbed dose.
subclass of: radiation unit

acceleration unit
type: Class
comment: A standard measure for acceleration.
subclass of: unit

unit
type: Class
comment: A unit is a particular physical quantity, defined and adopted by convention, with which other particular quantities of the same kind are compared to express their value.

amount of substance concentration unit
type: Class
comment: A standard measure for an amount of substance concentration.
subclass of: concentration unit

concentration unit
type: Class
comment: A standard measure of concentration.
subclass of: unit

amount of substance unit
type: Class
comment: A standard measure for the amount of substance.
subclass of: unit

angle unit
type: Class
comment: A standard measure for angle.
subclass of: unit

angular acceleration unit
type: Class
comment: A standard measure for angular acceleration unit.
subclass of: unit

angular velocity unit
type: Class
comment: A standard measure for angular velocity.
subclass of: unit

area density unit
type: Class
comment: A standard measure of area density.
subclass of: density unit

density unit
type: Class
comment: A standard measure of density.
subclass of: unit

area unit
type: Class
comment: A standard measure for area.
subclass of: unit

atto scaled unit
type: Class
comment: A unit scaled by 10^-18.
subclass of: scaled unit

scaled unit
type: Class
comment: A unit that is scaled by some value.
subclass of: DerivedUnit

capacitance unit
type: Class
comment: A standard measure for capacitance.
subclass of: unit

catalytic activity unit
type: Class
comment: A standard measure for catalytic activity.
subclass of: unit

catalytic concentration unit
type: Class
comment: A standard measure for catalytic concentration.
subclass of: concentration unit

centi scaled unit
type: Class
comment: A unit scaled by 10^-2.
subclass of: scaled unit

conduction unit
type: Class
comment: A standard measure of conduction.
subclass of: unit

currency unit
type: Class
comment: A national or standard currency.
subclass of: unit

deci scaled unit
type: Class
comment: A unit scaled by 10^-1.
subclass of: scaled unit

deka scaled unit
type: Class
comment: A unit scaled by 10^2.
subclass of: scaled unit

DerivedUnit
type: Class
comment: A derived unit is one that is obtained by other units through a mathematical transformation.
subclass of: unit

dose equivalent unit
type: Class
comment: A standard measure for dose equivalence.
subclass of: radiation unit

dynamic viscosity unit
type: Class
comment: A standard measure for dynamic viscosity.
subclass of: unit

electric charge density unit
type: Class
comment: A standard measure for electric charge density.
subclass of: unit

electric charge unit
type: Class
comment: A standard measure for electric charge.
subclass of: unit

electric conduction unit
type: Class
comment: A standard measure for electric conduction.
subclass of: conduction unit

electric current density unit
type: Class
comment: A standard measure for electric current density.
subclass of: unit

electric current unit
type: Class
comment: A standard measure for electric current.
subclass of: unit

electric field strength unit
type: Class
comment: A standard measure for electric field strength.
subclass of: unit

electric flux density unit
type: Class
comment: A standard measure for electric flux density.
subclass of: unit

electric resistance unit
type: Class
comment: A standard measure for electric resistance.
subclass of: unit

electromagnetic radiation unit
type: Class
comment: A standard measure of electromagnetic radiation.
subclass of: unit

energy density unit
type: Class
comment: A standard measure for energy density.
subclass of: unit

energy unit
type: Class
comment: A standard measure for energy.
subclass of: unit

entropy unit
type: Class
comment: A standard measure for entropy.
subclass of: unit

exa scaled unit
type: Class
comment: A unit scaled by 10^18.
subclass of: scaled unit

exposure unit
type: Class
comment: A standard measure for radiation exposure.
subclass of: radiation unit

femto scaled unit
type: Class
comment: A unit scaled by 10^-15.
subclass of: scaled unit

force unit
type: Class
comment: A standard measure for force.
subclass of: unit

frequency unit
type: Class
comment: A standard measure for frequency.
subclass of: unit

giga scaled unit
type: Class
comment: A unit scaled by 10^9.
subclass of: scaled unit

hecto scaled unit
type: Class
comment: A unit scaled by 10^2.
subclass of: scaled unit

illuminance unit
type: Class
comment: A standard measure for illuminance.
subclass of: electromagnetic radiation unit

inductance unit
type: Class
comment: A standard measure for inductance.
subclass of: unit

information unit
type: Class
comment: A standard measure of information.
subclass of: unit

irradiance unit
type: Class
comment: A standard measure for irradiance.
subclass of: electromagnetic radiation unit

kilo scaled unit
type: Class
comment: A unit scaled by 10^3.
subclass of: scaled unit

length unit
type: Class
comment: A standard measure for length.
subclass of: unit

linear density unit
type: Class
comment: A standard measure of linear density.
subclass of: density unit

luminance unit
type: Class
comment: A standard measure for luminance.
subclass of: electromagnetic radiation unit

luminous flux unit
type: Class
comment: A standard measure for luminous flux.
subclass of: electromagnetic radiation unit

luminous intensity unit
type: Class
comment: A standard measure for luminous intensity.
subclass of: electromagnetic radiation unit

magnetic field strength
type: Class
comment: A standard measure for magnetic field strength.
subclass of: unit

magnetic flux density unit
type: Class
comment: A standard measure for magnetic flux density.
subclass of: unit

magnetic flux unit
type: Class
comment: A standard measure for magnetic flux.
subclass of: unit

mass unit
type: Class
comment: A standard measure for mass.
subclass of: unit

mega scaled unit
type: Class
comment: A unit scaled by 10^6.
subclass of: scaled unit

micro scaled unit
type: Class
comment: A unit scaled by 10^-6.
subclass of: scaled unit

milli scaled unit
type: Class
comment: A unit scaled by 10^-3.
subclass of: scaled unit

molality unit
type: Class
comment: A standard measure of molality.
subclass of: concentration unit

molar energy unit
type: Class
comment: A standard measure for molar energy.
subclass of: unit

molar entropy unit
type: Class
comment: A standard measure for molar entropy.
subclass of: unit

molar mass unit
type: Class
comment: A standard measure for molar mass.
subclass of: unit

molecular mass unit
type: Class
comment: A standard measure for molecular mass.
subclass of: unit

moment of force unit
type: Class
comment: A standard measure for moment of force.
subclass of: unit

nano scaled unit
type: Class
comment: A unit scaled by 10^-9.
subclass of: scaled unit

parts per notation
type: Class
comment: A standard measure of parts per notation.
subclass of: concentration unit

permeability unit
type: Class
comment: A standard measure for permeability.
subclass of: unit

permittivity unit
type: Class
comment: A standard measure for permittivity.
subclass of: unit

peta scaled unit
type: Class
comment: A unit scaled by 10^15.
subclass of: scaled unit

pico scaled unit
type: Class
comment: A unit scaled by 10^-12.
subclass of: scaled unit

plane angle unit
type: Class
comment: A standard measure for plane angle.
subclass of: angle unit

potential difference unit
type: Class
comment: A standard measure for potential difference.
subclass of: unit

power unit
type: Class
comment: A standard measure for power.
subclass of: unit

pressure unit
type: Class
comment: A standard measure for pressure.
subclass of: unit

radiance unit
type: Class
comment: A standard measure for radiance.
subclass of: electromagnetic radiation unit

radiant intensity unit
type: Class
comment: A standard measure for radiant intensity.
subclass of: electromagnetic radiation unit

radioactivity activity
type: Class
comment: A standard measure for radioactive activity.
subclass of: radiation unit

shifted unit
type: Class
comment: A unit that is shifted by some value.
subclass of: DerivedUnit

solid angle unit
type: Class
comment: A standard measure for solid angle.
subclass of: angle unit

specific energy unit
type: Class
comment: A standard measure for specific energy.
subclass of: unit

specific entropy unit
type: Class
comment: A standard measure for specific entropy.
subclass of: unit

specific volume unit
type: Class
comment: A standard measure for specific volume.
subclass of: unit

surface tension unit
type: Class
comment: A standard measure for surface tension.
subclass of: unit

temperature unit
type: Class
comment: A standard measure for temperature.
subclass of: unit

tera scaled unit
type: Class
comment: A unit scaled by 10^12.
subclass of: scaled unit

thermal conduction unit
type: Class
comment: A standard measure for thermal conduction.
subclass of: conduction unit

time unit
type: Class
comment: A standard measure for time.
subclass of: unit

unit raised to power
type: Class
comment: A unit that raised to some power.
subclass of: DerivedUnit

unit raised to power of negative one
type: Class
comment: A unit that is raised to the power of -1.
subclass of: unit raised to power

unit raised to power of negative three
type: Class
comment: A unit that is raised to a power -3.
subclass of: unit raised to power

unit raised to power of negative two
type: Class
comment: A unit that is raised by power -2
subclass of: unit raised to power

unit raised to power of one
type: Class
comment: A unit that is raised to the power 1.
subclass of: unit raised to power

unit raised to power of three
type: Class
comment: A unit that is raised to power 3.
subclass of: unit raised to power

unit raised to power of two
type: Class
comment: A unit that is raised by power of 2.
subclass of: unit raised to power

velocity unit
type: Class
comment: A standard measure for velocity.
subclass of: unit

volume density unit
type: Class
comment: A standard measure for volume density.
subclass of: density unit

volume unit
type: Class
comment: A standard measure for volume.
subclass of: unit

wavenumber unit
type: Class
comment: A standard measure for wavenumber.
subclass of: unit

yocto scaled unit
type: Class
comment: A unit scaled by 10^-24.
subclass of: scaled unit

yotta scaled unit
type: Class
comment: A unit scaled by 10^24.
subclass of: scaled unit

zepto scaled unit
type: Class
comment: A unit scaled by 10^-21.
subclass of: scaled unit

zetta scaled unit
type: Class
comment: A unit scaled by 10^21.
subclass of: scaled unit

pH unit
type: Class
comment: A standard measure of pH.
subclass of: concentration unit

has unit
type: ObjectProperty
comment: A relation to specify the unit of some measurement.
inverse of: is unit of
range: unit

is unit of
type: ObjectProperty
comment: A relation to specify the measurement using some unit.
inverse of: has unit
domain: unit

is raised to the power of
type: DatatypeProperty
range: double

is scaled by
type: DatatypeProperty
range: double

is shifted by
type: DatatypeProperty
range: double