# RealEstateCore Units Module

URI
https://w3id.org/rec/units/
Version URI
https://w3id.org/rec/units/3.3/
Imports
Ontology RDF
RDF (xml)

## Description

This RealEstateCore module includes a subset of the QUDT ontology and instances, for easy reuse throughout the rest of REC.

## Overview

Figure 1: Ontology overview

## Classes ↑

### DerivedUnitc# Classes

URI http://qudt.org/schema/qudt/DerivedUnit qudt:Unitc unit:YD3 unit:MilliM unit:KiloGM-PER-HR unit:LM unit:KiloPA unit:REV-PER-MIN unit:CentiM-PER-SEC2 unit:T unit:IN3 unit:ARCSEC unit:MI2 unit:REV-PER-SEC unit:C unit:WB unit:KiloGM-PER-SEC unit:PicoC unit:M-PER-SEC unit:RAD-PER-SEC2 unit:W unit:FT3 unit:KiloHZ unit:BIT-PER-SEC unit:KiloM unit:HZ unit:N unit:DEG-PER-SEC unit:M3-PER-HR unit:FARAD unit:V unit:DEG-PER-SEC2 unit:MicroFARAD unit:MilliSEC unit:W-PER-M2 unit:J unit:GigaHZ unit:MicroM unit:CentiM2 unit:PA unit:PicoFARAD unit:MicroC unit:CentiM-PER-SEC unit:N-M unit:M3-PER-SEC unit:M2 unit:MicroH unit:ARCMIN unit:YD2 unit:LUX unit:IN2 unit:MegaHZ unit:M-PER-SEC2 unit:M-PER-HR unit:DEG_C unit:CD-PER-M2 unit:MegaEV unit:KiloGM-PER-M3 unit:RAD unit:RAD-PER-SEC unit:FT2 unit:NanoFARAD unit:KiloW unit:AC unit:BYTE unit:MilliC unit:CentiM unit:CentiM3 unit:OHM unit:H unit:MilliM3 unit:NanoC unit:MilliH unit:M3 unit:DEG-PER-HR unit:NanoSEC

### DimensionlessUnitc# Classes

URI http://qudt.org/schema/qudt/DimensionlessUnit qudt:Unitc qudt:LogarithmicUnitc unit:B unit:UNITLESS unit:DeciB

### LogarithmicUnitc# Classes

URI http://qudt.org/schema/qudt/LogarithmicUnit qudt:DimensionlessUnitc unit:DeciB unit:B

### Quantity Kindc# Classes

URI http://qudt.org/schema/qudt/QuantityKind http://qudt.org/2.1/schema/qudt A "Quantity Kind" is any observable property that can be measured and quantified numerically. Familiar examples include physical properties such as length, mass, time, force, energy, power, electric charge, etc. Less familiar examples include currency, interest rate, price to earning ratio, and information capacity. qudt:hasQuantityKindop quantitykind:SoundPressureLevel quantitykind:MagneticFlux quantitykind:Resistance quantitykind:Area quantitykind:Time quantitykind:DataRate quantitykind:Force quantitykind:DataSize quantitykind:VolumeFlowRate quantitykind:Power quantitykind:RelativeHumidity quantitykind:Pressure quantitykind:Irradiance quantitykind:ElectricCharge quantitykind:MagneticFluxDensity quantitykind:ElectricCurrent quantitykind:Inductance quantitykind:Mass quantitykind:Velocity quantitykind:Acceleration quantitykind:Voltage quantitykind:Volume quantitykind:MassFlowRate quantitykind:Efficiency quantitykind:Temperature quantitykind:Length quantitykind:AngularVelocity quantitykind:AngularAcceleration quantitykind:Concentration quantitykind:Density quantitykind:Capacitance quantitykind:Frequency quantitykind:Luminance quantitykind:PowerFactor quantitykind:Conductivity quantitykind:LuminousIntensity quantitykind:Thrust quantitykind:Distance quantitykind:Angle quantitykind:Illuminance quantitykind:LuminousFlux quantitykind:Energy quantitykind:Torque

### Unitc# Classes

URI http://qudt.org/schema/qudt/Unit http://qudt.org/2.1/schema/qudt A unit of measure, or unit, is a particular quantity value that has been chosen as a scale for measuring other quantities of the same kind. qudt:hasQuantityKindop only qudt:QuantityKindc qudt:abbreviationdp min 0 qudt:DerivedUnitc qudt:DimensionlessUnitc unit:KiloGM-PER-M3 unit:RAD unit:KibiBYTE-PER-SEC unit:IN_H2O unit:FT2 unit:NanoFARAD unit:KiloW unit:AC unit:MilliV unit:IN3 unit:M unit:BYTE unit:MebiBIT unit:MI2 unit:MilliC unit:PPM unit:EV unit:KibiBYTE unit:CentiM unit:C unit:GigaJ unit:LB_F unit:CentiM3 unit:PSI unit:PicoC unit:OHM unit:OZ_F unit:GibiBYTE-PER-SEC unit:H unit:MilliM3 unit:MilliBAR unit:HP unit:MilliH unit:YobiBYTE-PER-SEC unit:GAL_UK unit:B unit:M3 unit:GibiBIT-PER-SEC unit:DEG-PER-HR unit:OZ_VOL_US unit:MX unit:NanoM unit:DEG unit:NanoSEC unit:KiloJ unit:MebiBIT-PER-SEC unit:L-PER-SEC unit:MicroGM unit:TebiBIT unit:GM unit:KiloHZ unit:MegaV unit:RAD-PER-HR unit:MilliL-PER-HR unit:ExbiBIT unit:HZ unit:KiloGM-PER-HR unit:AU unit:UNITLESS unit:KiloM-PER-SEC unit:KiloPA unit:OZ_VOL_UK unit:REV-PER-MIN unit:CentiM-PER-SEC2 unit:T unit:KiloV unit:DEG-PER-MIN unit:KiloA unit:MicroFARAD unit:MIN unit:TebiBYTE-PER-SEC unit:ARCSEC unit:MI_N unit:REV-PER-SEC2 unit:BIT unit:MI-PER-HR unit:REV-PER-SEC unit:REV-PER-HR unit:WB unit:MicroSEC unit:KiloGM-PER-SEC unit:MilliW unit:M-PER-SEC unit:FT unit:MilliL-PER-SEC unit:KiloGM unit:LB-PER-FT3 unit:MilliOHM unit:KiloM2 unit:HA unit:ExbiBYTE unit:MicroA unit:IN_HG unit:RAD-PER-SEC2 unit:ExbiBIT-PER-SEC unit:MI unit:GM-PER-DeciM3 unit:G unit:W unit:A unit:CD unit:MilliM2 unit:FT3 unit:M3-PER-SEC unit:KibiBIT unit:PERCENT unit:BIT-PER-SEC unit:ZebiBYTE unit:KiloM unit:FC unit:GM-PER-M3 unit:KibiBIT-PER-SEC unit:YD unit:YobiBIT-PER-SEC unit:N unit:M-PER-HR unit:GibiBIT unit:YR unit:DEG-PER-SEC unit:CD-PER-M2 unit:M3-PER-HR unit:MilliA unit:SLUG unit:YobiBIT unit:GAL_US unit:RAD-PER-SEC unit:FARAD unit:V unit:DEG-PER-SEC2 unit:HR unit:MilliFARAD unit:KN unit:BAR unit:TONNE unit:IN unit:MilliSEC unit:TON_F_US unit:KiloOHM unit:LB-PER-YD3 unit:S-PER-M unit:TebiBIT-PER-SEC unit:W-PER-M2 unit:J unit:GigaHZ unit:DeciB unit:L-PER-HR unit:ZebiBIT unit:MebiBYTE-PER-SEC unit:GibiBYTE unit:BYTE-PER-SEC unit:MicroV unit:MicroM unit:REV unit:GM-PER-SEC unit:NanoC unit:CentiM2 unit:PA unit:PicoFARAD unit:DAY unit:KiloW-HR unit:MI-PER-SEC unit:MicroC unit:SEC unit:GigaW unit:ZebiBIT-PER-SEC unit:MegaW unit:CentiM-PER-SEC unit:N-M unit:RAD-PER-MIN unit:M2 unit:MegaJ unit:MilliGM unit:MicroH unit:MicroW unit:YD3 unit:TebiBYTE unit:ARCMIN unit:YD2 unit:MilliM_HG unit:MebiBYTE unit:LUX unit:IN2 unit:GM-PER-HR unit:YobiBYTE unit:MilliM unit:MegaHZ unit:M-PER-SEC2 unit:KiloGM_F unit:KiloM-PER-HR unit:ExbiBYTE-PER-SEC unit:DEG_F unit:LM unit:K unit:MegaOHM unit:DEG_C unit:MegaEV unit:ZebiBYTE-PER-SEC unit:L

## Object Properties ↑

### applicableImperialUnitop # OPs

URI http://qudt.org/schema/qudt/applicableImperialUnit

### applicableSIUnitop # OPs

URI http://qudt.org/schema/qudt/applicableSIUnit

### applicableUnitop # OPs

URI http://qudt.org/schema/qudt/applicableUnit

### exactMatchop # OPs

URI http://qudt.org/schema/qudt/exactMatch

### has quantity kindop # OPs

URI http://qudt.org/schema/qudt/hasQuantityKind http://qudt.org/2.1/schema/qudt qudt:QuantityKindc

### isScalingOfop # OPs

URI http://qudt.org/schema/qudt/isScalingOf

### unitop # OPs

URI http://qudt.org/schema/qudt/unit http://qudt.org/2.1/schema/qudt A reference to the unit of measure of a quantity (variable or constant) of interest

URI http://www.w3.org/2004/02/skos/core#broader

### closeMatchop # OPs

URI http://www.w3.org/2004/02/skos/core#closeMatch

### exactMatchop # OPs

URI http://www.w3.org/2004/02/skos/core#exactMatch

### wasDerivedFromop # OPs

URI http://www.w3.org/ns/prov#wasDerivedFrom

## Datatype Properties ↑

### abbreviationdp # DPs

URI http://qudt.org/schema/qudt/abbreviation http://qudt.org/2.1/schema/qudt An abbreviation for a unit is a short ASCII string that is used in place of the full name for the unit in contexts where non-ASCII characters would be problematic, or where using the abbreviation will enhance readability. When a power of abase unit needs to be expressed, such as squares this can be done using abbreviations rather than symbols. For example, "sq ft" means "square foot", and "cu ft" means "cubic foot". xsd:stringc

### baseCGSUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseCGSUnitDimensions

### baseISOUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseISOUnitDimensions

### baseImperialUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseImperialUnitDimensions

### baseSIUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseSIUnitDimensions

### baseUSCustomaryUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseUSCustomaryUnitDimensions

### baseUnitDimensionsdp # DPs

URI http://qudt.org/schema/qudt/baseUnitDimensions

### conversionCoefficientdp # DPs

URI http://qudt.org/schema/qudt/conversionCoefficient

### conversionMultiplierdp # DPs

URI http://qudt.org/schema/qudt/conversionMultiplier

### conversionOffsetdp # DPs

URI http://qudt.org/schema/qudt/conversionOffset

### iddp # DPs

URI http://qudt.org/schema/qudt/id

### iec61360Codedp # DPs

URI http://qudt.org/schema/qudt/iec61360Code

### latexSymboldp # DPs

URI http://qudt.org/schema/qudt/latexSymbol

### plainTextDescriptiondp # DPs

URI http://qudt.org/schema/qudt/plainTextDescription

### siUnitsExpressiondp # DPs

URI http://qudt.org/schema/qudt/siUnitsExpression

### symboldp # DPs

URI http://qudt.org/schema/qudt/symbol

### uneceCommonCodedp # DPs

URI http://qudt.org/schema/qudt/uneceCommonCode

### urldp # DPs

URI http://qudt.org/schema/qudt/url

## Annotation Properties ↑

### descriptionap # APs

URI http://purl.org/dc/terms/description

### plainTextDescriptionap # APs

URI http://purl.org/dc/terms/plainTextDescription

### dbpediaMatchap # APs

URI http://qudt.org/schema/qudt/dbpediaMatch

### descriptionap # APs

URI http://qudt.org/schema/qudt/description

### expressionap # APs

URI http://qudt.org/schema/qudt/expression

### guidanceap # APs

URI http://qudt.org/schema/qudt/guidance

### informativeReferenceap # APs

URI http://qudt.org/schema/qudt/informativeReference

### isDerivedCoherentUnitOfSystemap # APs

URI http://qudt.org/schema/qudt/isDerivedCoherentUnitOfSystem

### isDerivedUnitOfSystemap # APs

URI http://qudt.org/schema/qudt/isDerivedUnitOfSystem

### isoNormativeReferenceap # APs

URI http://qudt.org/schema/qudt/isoNormativeReference

### latexDefinitionap # APs

URI http://qudt.org/schema/qudt/latexDefinition

### normativeReferenceap # APs

URI http://qudt.org/schema/qudt/normativeReference

### outOfScopeap # APs

URI http://qudt.org/schema/qudt/outOfScope

### quantityKindap # APs

URI http://qudt.org/schema/qudt/quantityKind

### symbolTokenap # APs

URI http://qudt.org/schema/qudt/symbolToken

### ucumCodeap # APs

URI http://qudt.org/schema/qudt/ucumCode

### hasGovernanceap # APs

URI http://www.linkedmodel.org/owl/schema/core#hasGovernance

### commentap # APs

URI http://www.linkedmodel.org/schema/vaem#comment

### todoap # APs

URI http://www.linkedmodel.org/schema/vaem#todo

### altLabelap # APs

URI http://www.w3.org/2004/02/skos/core#altLabel

### prefLabelap # APs

URI http://www.w3.org/2004/02/skos/core#prefLabel

## Named Individuals ↑

### Accelerationni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Acceleration  http://qudt.org/2.1/vocab/quantitykind Acceleration is the (instantaneous) rate of change of velocity. Acceleration may be either linear acceleration, or angular acceleration. It is a vector quantity with dimension $$length/time^{2}$$ for linear acceleration, or in the case of angular acceleration, with dimension $$angle/time^{2}$$. In SI units, linear acceleration is measured in $$meters/second^{2}$$ ($$m \cdot s^{-2}$$) and angular acceleration is measured in $$radians/second^{2}$$. In physics, any increase or decrease in speed is referred to as acceleration and similarly, motion in a circle at constant speed is also an acceleration, since the direction component of the velocity is changing.

### Angleni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Angle  http://qudt.org/2.1/vocab/quantitykind The inclination to each other of two intersecting lines, measured by the arc of a circle intercepted between the two lines forming the angle, the center of the circle being the point of intersection. An acute angle is less than $$90^\circ$$, a right angle $$90^\circ$$; an obtuse angle, more than $$90^\circ$$ but less than $$180^\circ$$; a straight angle, $$180^\circ$$; a reflex angle, more than $$180^\circ$$ but less than $$360^\circ$$; a perigon, $$360^\circ$$. Any angle not a multiple of $$90^\circ$$ is an oblique angle. If the sum of two angles is $$90^\circ$$, they are complementary angles; if $$180^\circ$$, supplementary angles; if $$360^\circ$$, explementary angles.

### Angular Accelerationni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/AngularAcceleration  http://qudt.org/2.1/vocab/quantitykind Angular acceleration is the rate of change of angular velocity over time. Measurement of the change made in the rate of change of an angle that a spinning object undergoes per unit time. It is a vector quantity. Also called Rotational acceleration. In SI units, it is measured in radians per second squared ($$rad/s^2$$), and is usually denoted by the Greek letter alpha.

### Angular Velocityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/AngularVelocity  http://qudt.org/2.1/vocab/quantitykind

### Areani

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Area  http://qudt.org/2.1/vocab/quantitykind

### Capacitanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Capacitance  http://qudt.org/2.1/vocab/quantitykind

### Concentrationni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Concentration 

### Conductivityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Conductivity 

### Data Rateni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/DataRate  http://qudt.org/2.1/vocab/quantitykind

### Data Sizeni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/DataSize 

### Densityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Density  http://qudt.org/2.1/vocab/quantitykind The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is $$\rho$$. Mathematically, density is defined as mass divided by volume: $$\rho = m/V$$, where $$\rho$$ is the density, $$m$$ is the mass, and $$V$$ is the volume. In some cases, density is also defined as its weight per unit volume, although this quantity is more properly called specific weight.

### Distanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Distance  http://qudt.org/2.1/vocab/quantitykind

### Efficiencyni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Efficiency  http://qudt.org/2.1/vocab/quantitykind

### Electric Chargeni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/ElectricCharge  http://qudt.org/2.1/vocab/quantitykind "Electric Charge" is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The electric charge on a body may be positive or negative. Two positively charged bodies experience a mutual repulsive force, as do two negatively charged bodies. A positively charged body and a negatively charged body experience an attractive force. Electric charge is carried by discrete particles and can be positive or negative. The sign convention is such that the elementary electric charge $$e$$, that is, the charge of the proton, is positive. The SI derived unit of electric charge is the coulomb. quantitykind:ElectricCurrent

### Electric Currentni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/ElectricCurrent  http://qudt.org/2.1/vocab/quantitykind

### Energyni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Energy  http://qudt.org/2.1/vocab/quantitykind

### Forceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Force  http://qudt.org/2.1/vocab/quantitykind "Force" is an influence that causes mass to accelerate. It may be experienced as a lift, a push, or a pull. Force is defined by Newton's Second Law as $$F = m \times a$$, where $$F$$ is force, $$m$$ is mass and $$a$$ is acceleration. Net force is mathematically equal to the time rate of change of the momentum of the body on which it acts. Since momentum is a vector quantity (has both a magnitude and direction), force also is a vector quantity.

### Frequencyni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Frequency  http://qudt.org/2.1/vocab/quantitykind "Frequency" is the number of occurrences of a repeating event per unit time. The repetition of the events may be periodic (that is. the length of time between event repetitions is fixed) or aperiodic (i.e. the length of time between event repetitions varies). Therefore, we distinguish between periodic and aperiodic frequencies. In the SI system, periodic frequency is measured in hertz (Hz) or multiples of hertz, while aperiodic frequency is measured in becquerel (Bq). In spectroscopy, $$\nu$$ is mostly used. Light passing through different media keeps its frequency, but not its wavelength or wavenumber.

### Illuminanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Illuminance  http://qudt.org/2.1/vocab/quantitykind

### Inductanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Inductance  http://qudt.org/2.1/vocab/quantitykind

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Irradiance  http://qudt.org/2.1/vocab/quantitykind

### Lengthni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Length  http://qudt.org/2.1/vocab/quantitykind

### Luminanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Luminance  http://qudt.org/2.1/vocab/quantitykind

### Luminous Fluxni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/LuminousFlux  http://qudt.org/2.1/vocab/quantitykind

### Luminous Intensityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/LuminousIntensity  http://qudt.org/2.1/vocab/quantitykind

### Magnetic Fluxni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/MagneticFlux  http://qudt.org/2.1/vocab/quantitykind

### Magnetic flux densityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/MagneticFluxDensity  http://qudt.org/2.1/vocab/quantitykind "Magnetic Flux Density" is a vector quantity and is the magnetic flux per unit area of a magnetic field at right angles to the magnetic force. It can be defined in terms of the effects the field has, for example by $$B = F/q v \sin \theta$$, where $$F$$ is the force a moving charge $$q$$ would experience if it was travelling at a velocity $$v$$ in a direction making an angle θ with that of the field. The magnetic field strength is also a vector quantity and is related to $$B$$ by: $$H = B/\mu$$, where $$\mu$$ is the permeability of the medium.

### Massni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Mass  http://qudt.org/2.1/vocab/quantitykind In physics, mass, more specifically inertial mass, can be defined as a quantitative measure of an object's resistance to acceleration. The SI unit of mass is the kilogram ($$kg$$)

### Mass Flow Rateni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/MassFlowRate  http://qudt.org/2.1/vocab/quantitykind "Mass Flow Rate} is a measure of Mass flux. The common symbol is $$\dot{m"$$ (pronounced "m-dot"), although sometimes $$\mu$$ is used. The SI units are $$kg s-1$$.

### Powerni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Power  http://qudt.org/2.1/vocab/quantitykind Power is the rate at which work is performed or energy is transmitted, or the amount of energy required or expended for a given unit of time. As a rate of change of work done or the energy of a subsystem, power is: $$P = W/t$$, where $$P$$ is power, $$W$$ is work and {t} is time.

### Power Factorni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/PowerFactor  http://qudt.org/2.1/vocab/quantitykind "Power Factor", under periodic conditions, is the ratio of the absolute value of the active power $$P$$ to the apparent power $$S$$.

### Pressureni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Pressure  http://qudt.org/2.1/vocab/quantitykind

### Relative Humidityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/RelativeHumidity  http://qudt.org/2.1/vocab/quantitykind "Relative Humidity} is the ratio of the partial pressure of water vapor in an air-water mixture to the saturated vapor pressure of water at a prescribed temperature. The relative humidity of air depends not only on temperature but also on the pressure of the system of interest. \textit{Relative Humidity} is also referred to as \text{Relative Partial Pressure". Relative partial pressure is often referred to as $$RH$$ and expressed in percent.

### Resistanceni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Resistance  http://qudt.org/2.1/vocab/quantitykind quantitykind:ElectricCurrent

### Sound pressure levelni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/SoundPressureLevel  http://qudt.org/2.1/vocab/quantitykind Sound pressure level ($$SPL$$) or sound level is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level.

### Temperatureni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Temperature  http://qudt.org/2.1/vocab/quantitykind

### Thrustni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Thrust  http://qudt.org/2.1/vocab/quantitykind Thrust is a reaction force described quantitatively by Newton's Second and Third Laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a proportional but opposite force on that system. The pushing or pulling force developed by an aircraft engine or a rocket engine. The force exerted in any direction by a fluid jet or by a powered screw, as, the thrust of an antitorque rotor. (symbol F). Specifically, in rocketry, $$F\,= m\cdot v$$ where m is propellant mass flow and v is exhaust velocity relative to the vehicle. Also called momentum thrust.

### Timeni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Time  http://qudt.org/2.1/vocab/quantitykind

### Torqueni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Torque  http://qudt.org/2.1/vocab/quantitykind In physics, a torque ($$\tau$$) is a vector that measures the tendency of a force to rotate an object about some axis. The magnitude of a torque is defined as force times its lever arm. Just as a force is a push or a pull, a torque can be thought of as a twist. The SI unit for torque is newton meters ($$N m$$). In U.S. customary units, it is measured in foot pounds (ft lbf) (also known as "pounds feet"). Mathematically, the torque on a particle (which has the position r in some reference frame) can be defined as the cross product: $$τ = r x F$$ where, r is the particle's position vector relative to the fulcrum F is the force acting on the particles, or, more generally, torque can be defined as the rate of change of angular momentum: $$τ = dL/dt$$ where, L is the angular momentum vector t stands for time.

### Velocityni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Velocity  http://qudt.org/2.1/vocab/quantitykind

### Voltageni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Voltage  http://qudt.org/2.1/vocab/quantitykind $$\textit{Voltage}$$, also referred to as $$\textit{Electric Tension}$$, is the difference between electrical potentials of two points. For an electric field within a medium, $$U_{ab} = - \int_{r_a}^{r_b} E . {dr}$$, where $$E$$ is electric field strength. For an irrotational electric field, the voltage is independent of the path between the two points $$a$$ and $$b$$.

### Volumeni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/Volume  http://qudt.org/2.1/vocab/quantitykind

### Volume Flow Rateni

Class(es)
qudt:QuantityKind
URI  http://qudt.org/vocab/quantitykind/VolumeFlowRate  http://qudt.org/2.1/vocab/quantitykind

### Ampereni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/A  http://qudt.org/2.1/vocab/unit The $$\textit{ampere}$$, often shortened to $$\textit{amp}$$, is the SI unit of electric current and is one of the seven SI base units. $$\text{A}\ \equiv\ \text{amp (or ampere)}\ \equiv\ \frac{\text{C}}{\text{s}}\ \equiv\ \frac{\text{coulomb}}{\text{second}}\ \equiv\ \frac{\text{J}}{\text{Wb}}\ \equiv\ \frac{\text{joule}}{\text{weber}}$$ Note that SI supports only the use of symbols and deprecates the use of any abbreviations for units.

### Acreni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/AC  http://qudt.org/2.1/vocab/unit The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. Its international symbol is ac. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land. One international acre is equal to 4046.8564224 square metres.

### ArcMinuteni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/ARCMIN  http://qudt.org/2.1/vocab/unit A minute of arc, arcminute, or minute arc (MOA), is a unit of angular measurement equal to one sixtieth (1/60) of one degree (circle/21,600), or $$\pi /10,800 radians$$. In turn, a second of arc or arcsecond is one sixtieth (1/60) of one minute of arc. Since one degree is defined as one three hundred and sixtieth (1/360) of a rotation, one minute of arc is 1/21,600 of a rotation.

### ArcSecondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/ARCSEC  http://qudt.org/2.1/vocab/unit "Arc Second" is a unit of angular measure, also called the $$\textit{second of arc}$$, equal to $$1/60 \; arcminute$$. One arcsecond is a very small angle: there are 1,296,000 in a circle. The SI recommends $$\textit{double prime}$$ ($$''$$) as the symbol for the arcsecond. The symbol has become common in astronomy, where very small angles are stated in milliarcseconds ($$mas$$).

### astronomical-unitni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/AU  http://qudt.org/2.1/vocab/unit An astronomical unit (abbreviated as AU, au, a.u., or ua) is a unit of length equal to $$149,597,870,700 metres$$ ($$92,955,807.273 mi$$) or approximately the mean Earth Sun distance.

### Belni

Class(es)
qudt:Unit
qudt:LogarithmicUnit
qudt:DimensionlessUnit
URI  http://qudt.org/vocab/unit/B  http://qudt.org/2.1/vocab/unit A logarithmic unit of sound pressure equal to 10 decibels (dB), It is defined as: $$1 B = (1/2) \log_{10}(Np)$$

### Barni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/BAR  http://qudt.org/2.1/vocab/unit The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to $$100,000\,Pa$$. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to $$100,000\,Pa = 1 \,bar \approx 750.0616827\, Torr$$. Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.

### Bitni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/BIT  http://qudt.org/2.1/vocab/unit In information theory, a bit is the amount of information that, on average, can be stored in a discrete bit. It is thus the amount of information carried by a choice between two equally likely outcomes. One bit corresponds to about 0.693 nats (ln(2)), or 0.301 hartleys (log10(2)).

### Bit per Secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/BIT-PER-SEC  http://qudt.org/2.1/vocab/unit A bit per second (B/s) is a unit of data transfer rate equal to 1 bits per second.

### Byteni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/BYTE  http://qudt.org/2.1/vocab/unit The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.

### Byte per Secondni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/BYTE-PER-SEC 

### Coulombni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/C  http://qudt.org/2.1/vocab/unit The SI unit of electric charge. One coulomb is the amount of charge accumulated in one second by a current of one ampere. Electricity is actually a flow of charged particles, such as electrons, protons, or ions. The charge on one of these particles is a whole-number multiple of the charge e on a single electron, and one coulomb represents a charge of approximately 6.241 506 x 1018 e. The coulomb is named for a French physicist, Charles-Augustin de Coulomb (1736-1806), who was the first to measure accurately the forces exerted between electric charges.

### Candelani

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/CD  http://qudt.org/2.1/vocab/unit $$\textit{Candela}$$ is a unit for 'Luminous Intensity' expressed as $$cd$$. The candela is the SI base unit of luminous intensity; that is, power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function). A common candle emits light with a luminous intensity of roughly one candela.

### candela per square meterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CD-PER-M2  http://qudt.org/2.1/vocab/unit The candela per square metre ($$cd/m^2$$) is the derived SI unit of luminance. The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. Nit (nt) is a deprecated non-SI name also used for this unit ($$1 nit = 1 cd/m^2$$). As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. Most consumer desktop liquid crystal displays have luminances of 200 to 300 $$cd/m^2$$; the sRGB spec for monitors targets 80 cd/m2. HDTVs range from 450 to about 1000 cd/m2. Typically, calibrated monitors should have a brightness of $$120 cd/m^2$$. $$Nit$$ is believed to come from the Latin word nitere, to shine.

### Centimeterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CentiM  http://qudt.org/2.1/vocab/unit A centimetre is a unit of length in the metric system, equal to one hundredth of a metre, which is the SI base unit of length. Centi is the SI prefix for a factor of 10. The centimetre is the base unit of length in the now deprecated centimetre-gram-second (CGS) system of units.

### centimeter per secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CentiM-PER-SEC  http://qudt.org/2.1/vocab/unit "Centimeter per Second" is a C.G.S System unit for 'Linear Velocity' expressed as $$cm/s$$.

### Centimeter per Second Squaredni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CentiM-PER-SEC2  http://qudt.org/2.1/vocab/unit $$\textit{Centimeter per Second Squared}$$ is a C.G.S System unit for $$\textit{Linear Acceleration}$$ expressed as $$cm/s^2$$.

### Square Centimeterni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CentiM2  http://qudt.org/2.1/vocab/unit A unit of area equal to that of a square, of sides 1cm

### cubic centimeterni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/CentiM3  http://qudt.org/2.1/vocab/unit The CGS unit of volume, equal to 10-6 cubic meter, 1 milliliter, or about 0.061 023 7 cubic inch

### Dayni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/DAY  http://qudt.org/2.1/vocab/unit Mean solar day

### Degreeni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/DEG  http://qudt.org/2.1/vocab/unit A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by $$^\circ$$ (the degree symbol), is a measurement of plane angle, representing 1/360 of a full rotation; one degree is equivalent to $$2\pi /360 rad$$, $$0.017453 rad$$. It is not an SI unit, as the SI unit for angles is radian, but is an accepted SI unit.

### Degree per Hourni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/DEG-PER-HR  http://qudt.org/2.1/vocab/unit "Degree per Hour" is an Imperial unit for 'Angular Velocity' expressed as $$deg/h$$.

### Degree per Minuteni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/DEG-PER-MIN  http://qudt.org/2.1/vocab/unit A unit of measure for the rate of change of plane angle, $$d\omega / dt$$, in durations of one minute.The vector $$\omega$$ is directed along the axis of rotation in the direction for which the rotation is clockwise.

### Degree per Secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/DEG-PER-SEC  http://qudt.org/2.1/vocab/unit "Degree per Second" is an Imperial unit for 'Angular Velocity' expressed as $$deg/s$$.

### Degree per Second Squaredni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/DEG-PER-SEC2  http://qudt.org/2.1/vocab/unit $$\textit{Degree per Second Squared}$$ is an Imperial unit for $$\textit{Angular Acceleration}$$ expressed as $$deg/s^2$$.

### Degree Celsiusni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/DEG_C  http://qudt.org/2.1/vocab/unit $$\textit{Celsius}$$, also known as centigrade, is a scale and unit of measurement for temperature. It can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval, a difference between two temperatures or an uncertainty. This definition fixes the magnitude of both the degree Celsius and the kelvin as precisely 1 part in 273.16 (approximately 0.00366) of the difference between absolute zero and the triple point of water. Thus, it sets the magnitude of one degree Celsius and that of one kelvin as exactly the same. Additionally, it establishes the difference between the two scales' null points as being precisely $$273.15\,^{\circ}{\rm C}$$.

### Degree Fahrenheitni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/DEG_F  http://qudt.org/2.1/vocab/unit $$\textbf{Degree Fahrenheit} is an Imperial unit for 'Thermodynamic Temperature' expressed as \(\,^{\circ}{\rm F}$$

### Decibelni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:LogarithmicUnit
qudt:DimensionlessUnit
URI  http://qudt.org/vocab/unit/DeciB  http://qudt.org/2.1/vocab/unit A customary logarithmic measure most commonly used (in various ways) for measuring sound.Sound is measured on a logarithmic scale. Informally, if one sound is $$1\,bel$$ (10 decibels) "louder" than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibels corresponds to an increase of 10 x 10 or 100 times in intensity. The beginning of the scale, 0 decibels, can be set in different ways, depending on exactly the aspect of sound being measured. For sound intensity (the power of the sound waves per unit of area) $$0\,decibel$$ is equal to $$1\,picoWatts\,per\,Metre\,Squared$$. This corresponds approximately to the faintest sound that can be detected by a person who has good hearing. For sound pressure (the pressure exerted by the sound waves) 0 decibels equals $$20\,micropascals\,RMS$$, and for sound power $$0\,decibels$$ sometimes equals $$1\,picoWatt$$. In all cases, one decibel equals $$\approx\,0.115129\,neper$$.

### Electron Voltni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/EV  http://qudt.org/2.1/vocab/unit An electron volt (eV) is the energy that an electron gains when it travels through a potential of one volt. You can imagine that the electron starts at the negative plate of a parallel plate capacitor and accelerates to the positive plate, which is at one volt higher potential. Numerically $$1 eV$$ equals $$1.6x10^{-19} joules$$, where $$1 joule$$ is $$6.2x10^{18} eV$$. For example, it would take $$6.2x10^{20} eV/sec$$ to light a 100 watt light bulb.

### ExbiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ExbiBIT 

### ExbiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ExbiBIT-PER-SEC 

### ExbiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ExbiBYTE 

### ExbiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ExbiBYTE-PER-SEC 

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/FARAD  http://qudt.org/2.1/vocab/unit The SI unit of electric capacitance. Very early in the study of electricity scientists discovered that a pair of conductors separated by an insulator can store a much larger charge than an isolated conductor can store. The better the insulator, the larger the charge that the conductors can hold. This property of a circuit is called capacitance, and it is measured in farads. One farad is defined as the ability to store one coulomb of charge per volt of potential difference between the two conductors. This is a natural definition, but the unit it defines is very large. In practical circuits, capacitance is often measured in microfarads, nanofarads, or sometimes even in picofarads (10-12 farad, or trillionths of a farad). The unit is named for the British physicist Michael Faraday (1791-1867), who was known for his work in electricity and electrochemistry.

### Foot Candleni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/FC  http://qudt.org/2.1/vocab/unit "Foot Candle" is a unit for 'Luminous Flux Per Area' expressed as $$fc$$.

### Square Footni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/FT2  http://qudt.org/2.1/vocab/unit The square foot (plural square feet; abbreviated $$ft^2$$ or $$sq \, ft$$) is an imperial unit and U.S. customary unit of area, used mainly in the United States, Canada, United Kingdom, Hong Kong, Bangladesh, India, Pakistan and Afghanistan. It is defined as the area of a square with sides of 1 foot in length.

### Cubic Footni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/FT3  http://qudt.org/2.1/vocab/unit The cubic foot is an Imperial and US customary unit of volume, used in the United States and the United Kingdom. It is defined as the volume of a cube with sides of one foot (0.3048 m) in length. To calculate cubic feet multiply length X width X height.

### Gravityni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/G  http://qudt.org/2.1/vocab/unit "Gravity" is a unit for 'Linear Acceleration' expressed as $$G$$.

### Gallon (UK)ni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GAL_UK  http://qudt.org/2.1/vocab/unit

### US Gallonni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GAL_US  http://qudt.org/2.1/vocab/unit "US Gallon" is a unit for 'Liquid Volume' expressed as $$galUS$$.

### Gramni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GM  http://qudt.org/2.1/vocab/unit A unit of mass in the metric system. The name comes from the Greek gramma, a small weight identified in later Roman and Byzantine times with the Latin scripulum or scruple (the English scruple is equal to about 1.3 grams). The gram was originally defined to be the mass of one cubic centimeter of pure water, but to provide precise standards it was necessary to construct physical objects of specified mass. One gram is now defined to be 1/1000 of the mass of the standard kilogram, a platinum-iridium bar carefully guarded by the International Bureau of Weights and Measures in Paris for more than a century. (The kilogram, rather than the gram, is considered the base unit of mass in the SI.) The gram is a small mass, equal to about 15.432 grains or 0.035 273 966 ounce.

### Gram Per Decimetre Cubedni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GM-PER-DeciM3  http://qudt.org/2.1/vocab/unit

### Gram Per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GM-PER-HR  http://qudt.org/2.1/vocab/unit

### Gram Per Metre Cubedni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GM-PER-M3  http://qudt.org/2.1/vocab/unit

### Gram Per Secondni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GM-PER-SEC  http://qudt.org/2.1/vocab/unit

### GibiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GibiBIT 

### GibiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GibiBIT-PER-SEC 

### GibiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GibiBYTE 

### GibiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GibiBYTE-PER-SEC 

### Gigahertzni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/GigaHZ  http://qudt.org/2.1/vocab/unit The hertz (symbol Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. A GigaHertz is $$10^{9} hz$$.

### Gigajouleni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GigaJ  http://qudt.org/2.1/vocab/unit

### Gigawattni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/GigaW  http://qudt.org/2.1/vocab/unit

### Henryni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/H  http://qudt.org/2.1/vocab/unit The SI unit of electric inductance. A changing magnetic field induces an electric current in a loop of wire (or in a coil of many loops) located in the field. Although the induced voltage depends only on the rate at which the magnetic flux changes, measured in webers per second, the amount of the current depends also on the physical properties of the coil. A coil with an inductance of one henry requires a flux of one weber for each ampere of induced current. If, on the other hand, it is the current which changes, then the induced field will generate a potential difference within the coil: if the inductance is one henry a current change of one ampere per second generates a potential difference of one volt. The henry is a large unit; inductances in practical circuits are measured in millihenrys (mH) or microhenrys (u03bc H). The unit is named for the American physicist Joseph Henry (1797-1878), one of several scientists who discovered independently how magnetic fields can be used to generate alternating currents. $$\text{H} \; \equiv \; \text{henry}\; \equiv\; \frac{\text{Wb}}{\text{A}}\; \equiv\; \frac{\text{weber}}{\text{amp}}\; \equiv\ \frac{\text{V}\cdot\text{s}}{\text{A}}\; \equiv\; \frac{\text{volt} \cdot \text{second}}{\text{amp}}\; \equiv\ \Omega\cdot\text{s}\; \equiv\; \text{ohm.second}$$

### Hectareni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/HA  http://qudt.org/2.1/vocab/unit The customary metric unit of land area, equal to 100 ares. One hectare is a square hectometer, that is, the area of a square 100 meters on each side: exactly 10 000 square meters or approximately 107 639.1 square feet, 11 959.9 square yards, or 2.471 054 acres.

### Horsepowerni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/HP  http://qudt.org/2.1/vocab/unit 550 foot-pound force per second

### Hourni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/HR  http://qudt.org/2.1/vocab/unit The hour (common symbol: h or hr) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 seconds. It is approximately 1/24 of a mean solar day. An hour in the Universal Coordinated Time (UTC) time standard can include a negative or positive leap second, and may therefore have a duration of 3,599 or 3,601 seconds for adjustment purposes. Although it is not a standard defined by the International System of Units, the hour is a unit accepted for use with SI, represented by the symbol h.

### Hertzni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/HZ  http://qudt.org/2.1/vocab/unit The hertz (symbol Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and audio applications, such as the frequency of musical tones. The word "hertz" is named for Heinrich Rudolf Hertz, who was the first to conclusively prove the existence of electromagnetic waves.

### Inchni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/IN  http://qudt.org/2.1/vocab/unit An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. Corresponding units of area and volume are the square inch and the cubic inch.

### Square Inchni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/IN2  http://qudt.org/2.1/vocab/unit A square inch is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches: square in, sq inches, sq inch, sq in inches/-2, inch/-2, in/-2, inches^2, $$inch^2$$, $$in^2$$, $$inches^2$$, $$inch^2$$, $$in^2$$ or in some cases $$"^2$$. The square inch is a common unit of measurement in the United States and the United Kingdom.

### Cubic Inchni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/IN3  http://qudt.org/2.1/vocab/unit The cubic inch is a unit of measurement for volume in the Imperial units and United States customary units systems. It is the volume of a cube with each of its three sides being one inch long. The cubic inch and the cubic foot are still used as units of volume in the United States, although the common SI units of volume, the liter, milliliter, and cubic meter, are continually replacing them, especially in manufacturing and high technology. One cubic foot is equal to exactly 1728 cubic inches.

### Inch of Waterni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/IN_H2O  http://qudt.org/2.1/vocab/unit Inches of water, wc, inch water column (inch WC), inAq, Aq, or inH2O is a non-SI unit for pressure. The units are by convention and due to the historical measurement of certain pressure differentials. It is used for measuring small pressure differences across an orifice, or in a pipeline or shaft. Inches of water can be converted to a pressure unit using the formula for pressure head. It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions for example $$39 ^\circ F$$ at the standard acceleration of gravity; 1 inAq is approximately equal to 249 pascals at $$0 ^\circ C$$.

### Inch of Mercuryni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/IN_HG  http://qudt.org/2.1/vocab/unit Inches of mercury, (inHg) is a unit of measurement for pressure. It is still widely used for barometric pressure in weather reports, refrigeration and aviation in the United States, but is seldom used elsewhere. It is defined as the pressure exerted by a column of mercury of 1 inch in height at $$32 ^\circ F$$ at the standard acceleration of gravity. 1 inHg = 3,386.389 pascals at $$0 ^\circ C$$.

### Jouleni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/J  http://qudt.org/2.1/vocab/unit The SI unit of work or energy, defined to be the work done by a force of one newton acting to move an object through a distance of one meter in the direction in which the force is applied. Equivalently, since kinetic energy is one half the mass times the square of the velocity, one joule is the kinetic energy of a mass of two kilograms moving at a velocity of $$1 m/s$$.

### Kelvinni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/K  http://qudt.org/2.1/vocab/unit $$The SI base unit of temperature, previously called the degree Kelvin. One kelvin represents the same temperature difference as one degree Celsius. In 1967 the General Conference on Weights and Measures defined the temperature of the triple point of water (the temperature at which water exists simultaneously in the gaseous, liquid, and solid states) to be exactly 273.16 kelvins. Since this temperature is also equal to 0.01 u00b0C, the temperature in kelvins is always equal to 273.15 plus the temperature in degrees Celsius. The kelvin equals exactly 1.8 degrees Fahrenheit. The unit is named for the British mathematician and physicist William Thomson (1824-1907), later known as Lord Kelvin after he was named Baron Kelvin of Largs.$$

### Knotni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KN  http://qudt.org/2.1/vocab/unit The knot (pronounced 'not') is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. The abbreviation $$kn$$ is preferred by the International Hydrographic Organization (IHO), which includes every major sea-faring nation; however, the abbreviations kt (singular) and kts (plural) are also widely used. However, use of the abbreviation kt for knot conflicts with the SI symbol for kilotonne. The knot is a non-SI unit accepted for use with the International System of Units (SI). Worldwide, the knot is used in meteorology, and in maritime and air navigation - for example, a vessel travelling at 1 knot along a meridian travels one minute of geographic latitude in one hour. Etymologically, the term knot derives from counting the number of knots in the line that unspooled from the reel of a chip log in a specific time.

### KibiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KibiBIT 

### KibiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KibiBIT-PER-SEC 

### KibiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KibiBYTE 

### KibiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KibiBYTE-PER-SEC 

### kiloampereni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloA  http://qudt.org/2.1/vocab/unit

### Kilogramni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloGM  http://qudt.org/2.1/vocab/unit

### Kilogram per Hourni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloGM-PER-HR  http://qudt.org/2.1/vocab/unit Kilogram Per Hour (kg/h) is a unit in the category of Mass flow rate. It is also known as kilogram/hour. Kilogram Per Hour (kg/h) has a dimension of MT-1 where M is mass, and T is time. It can be converted to the corresponding standard SI unit kg/s by multiplying its value by a factor of 0.000277777777778.

### Kilogram per Cubic Meterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloGM-PER-M3  http://qudt.org/2.1/vocab/unit Kilogram per cubic metre is an SI derived unit of density, defined by mass in kilograms divided by volume in cubic metres. The official SI symbolic abbreviation is $$kg \cdot m^{-3}$$, or equivalently either $$kg/m^3$$.

### Kilogram per Secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloGM-PER-SEC  http://qudt.org/2.1/vocab/unit Kilogram Per Second (kg/s) is a unit in the category of Mass flow rate. It is also known as kilogram/second, kilograms per second. This unit is commonly used in the SI unit system. Kilogram Per Second (kg/s) has a dimension of $$MT^{-1}$$ where M is mass, and T is time. This unit is the standard SI unit in this category.

### Kilogram Forceni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloGM_F  http://qudt.org/2.1/vocab/unit "Kilogram Force" is a unit for 'Force' expressed as $$kgf$$.

### Kilohertzni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloHZ  http://qudt.org/2.1/vocab/unit "Kilohertz" is a C.G.S System unit for 'Frequency' expressed as $$KHz$$.

### Kilojouleni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloJ  http://qudt.org/2.1/vocab/unit

### Kilometer ni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloM  http://qudt.org/2.1/vocab/unit A common metric unit of length or distance. One kilometer equals exactly 1000 meters, about 0.621 371 19 mile, 1093.6133 yards, or 3280.8399 feet. Oddly, higher multiples of the meter are rarely used; even the distances to the farthest galaxies are usually measured in kilometers.

### Kilometer per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloM-PER-HR  http://qudt.org/2.1/vocab/unit "Kilometer per Hour" is a C.G.S System unit for 'Linear Velocity' expressed as $$km/hr$$.

### Kilometer per Secondni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloM-PER-SEC  http://qudt.org/2.1/vocab/unit "Kilometer per Second" is a C.G.S System unit for 'Linear Velocity' expressed as $$km/s$$.

### Square Kilometerni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloM2 

### Kiloohmni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloOHM  http://qudt.org/2.1/vocab/unit

### Kilopascalni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloPA  http://qudt.org/2.1/vocab/unit Kilopascal is a unit of pressure. 1 kPa is approximately the pressure exerted by a 10-g mass resting on a 1-cm2 area. 101.3 kPa = 1 atm. There are 1,000 pascals in 1 kilopascal.

### Kilovoltni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloV  http://qudt.org/2.1/vocab/unit

### Kilowattni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/KiloW  http://qudt.org/2.1/vocab/unit $$The kilowatt is a derived unit of power in the International System of Units (SI), The unit, defined as 1,000 joule per second, measures the rate of energy conversion or transfer.$$

### Kilowatthourni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/KiloW-HR  http://qudt.org/2.1/vocab/unit The kilowatt hour, or kilowatt-hour, (symbol $$kW \cdot h$$, $$kW h$$ or $$kWh$$) is a unit of energy equal to 1000 watt hours or 3.6 megajoules. For constant power, energy in watt hours is the product of power in watts and time in hours. The kilowatt hour is most commonly known as a billing unit for energy delivered to consumers by electric utilities.

### Literni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/L  http://qudt.org/2.1/vocab/unit The $$litre$$ (American spelling: $$\textit{liter}$$; SI symbol $$l$$ or $$L$$) is a non-SI metric system unit of volume equal to $$1 \textit{cubic decimetre}$$ ($$dm^3$$), 1,000 cubic centimetres ($$cm^3$$) or $$1/1000 \textit{cubic metre}$$. If the lower case "L" is used as the symbol, it is sometimes rendered as a cursive "l" to help distinguish it from the capital "I", although this usage has no official approval by any international bureau.

### Litre Per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/L-PER-HR  http://qudt.org/2.1/vocab/unit

### Litre Per Secondni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/L-PER-SEC  http://qudt.org/2.1/vocab/unit

### Pound per Cubic Footni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/LB-PER-FT3  http://qudt.org/2.1/vocab/unit "Pound per Cubic Foot" is an Imperial unit for 'Density' expressed as $$lb/ft^{3}$$.

### Pound per Cubic Yardni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/LB-PER-YD3  http://qudt.org/2.1/vocab/unit "Pound per Cubic Yard" is an Imperial unit for 'Density' expressed as $$lb/yd^{3}$$.

### Pound Forceni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/LB_F  http://qudt.org/2.1/vocab/unit "Pound Force" is an Imperial unit for 'Force' expressed as $$lbf$$.

### lumenni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/LM  http://qudt.org/2.1/vocab/unit The SI unit for measuring the flux of light being produced by a light source or received by a surface. The intensity of a light source is measured in candelas. One lumen represents the total flux of light emitted, equal to the intensity in candelas multiplied by the solid angle in steradians into which the light is emitted. A full sphere has a solid angle of $$4\cdot\pi$$ steradians. A light source that uniformly radiates one candela in all directions has a total luminous flux of $$1 cd\cdot 4 \pi sr = 4 \pi cd \cdot sr \approx 12.57 \; \text{lumens}$$. "Lumen" is a Latin word for light.

### Luxni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/LUX  http://qudt.org/2.1/vocab/unit The SI unit for measuring the illumination (illuminance) of a surface. One lux is defined as an illumination of one lumen per square meter or 0.0001 phot. In considering the various light units, it's useful to think about light originating at a point and shining upon a surface. The intensity of the light source is measured in candelas; the total light flux in transit is measured in lumens (1 lumen = 1 candelau00b7steradian); and the amount of light received per unit of surface area is measured in lux (1 lux = 1 lumen/square meter). One lux is equal to approximately 0.09290 foot candle.

### Meterni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/M  http://qudt.org/2.1/vocab/unit The metric and SI base unit of distance. The 17th General Conference on Weights and Measures in 1983 defined the meter as that distance that makes the speed of light in a vacuum equal to exactly 299 792 458 meters per second. The speed of light in a vacuum, $$c$$, is one of the fundamental constants of nature. The meter is equal to approximately 1.093 613 3 yards, 3.280 840 feet, or 39.370 079 inches.

### Meter per Hourni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M-PER-HR  http://qudt.org/2.1/vocab/unit Metre per hour is a metric unit of both speed (scalar) and velocity (Vector (geometry)). Its symbol is m/h or mu00b7h-1 (not to be confused with the imperial unit symbol mph. By definition, an object travelling at a speed of 1 m/h for an hour would move 1 metre.

### Meter per Secondni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M-PER-SEC  http://qudt.org/2.1/vocab/unit Metre per second is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds. The official SI symbolic abbreviation is mu00b7s-1, or equivalently either m/s.

### Meter per Second Squaredni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M-PER-SEC2  http://qudt.org/2.1/vocab/unit The $$\textit{meter per second squared}$$ is the unit of acceleration in the International System of Units (SI). As a derived unit it is composed from the SI base units of length, the metre, and the standard unit of time, the second. Its symbol is written in several forms as $$m/s^2$$, or $$m s^{-2}$$. As acceleration, the unit is interpreted physically as change in velocity or speed per time interval, that is, $$\textit{metre per second per second}$$.

### Square Meterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M2  http://qudt.org/2.1/vocab/unit The S I unit of area is the square metre.

### Cubic Meterni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M3  http://qudt.org/2.1/vocab/unit The SI unit of volume, equal to 1.0e6 cm3, 1000 liters, 35.3147 ft3, or 1.30795 yd3. A cubic meter holds about 264.17 U.S. liquid gallons or 219.99 British Imperial gallons.

### Cubic Meter per Hourni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M3-PER-HR  http://qudt.org/2.1/vocab/unit Cubic Meter Per Hour (m3/h) is a unit in the category of Volume flow rate. It is also known as cubic meters per hour, cubic metre per hour, cubic metres per hour, cubic meter/hour, cubic metre/hour, cubic meter/hr, cubic metre/hr, flowrate. Cubic Meter Per Hour (m3/h) has a dimension of L3T-1 where L is length, and T is time. It can be converted to the corresponding standard SI unit m3/s by multiplying its value by a factor of 0.00027777777.

### Cubic Meter per Secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/M3-PER-SEC  http://qudt.org/2.1/vocab/unit A cubic metre per second ($$m^{3}s^{-1}, m^{3}/s$$), cumecs or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a stere or cube with sides of one metre ( u0303 39.37 in) in length exchanged or moving each second. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC values measuring air flow.

### International Mileni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MI  http://qudt.org/2.1/vocab/unit The exact length of the land mile varied slightly among English-speaking countries until the international yard and pound agreement in 1959 established the yard as exactly 0.9144 metres, giving a mile of exactly 1,609.344 metres. The United States adopted this international mile for most purposes, but retained the pre-1959 mile for some land-survey data, terming it the US survey mile. In the US, statute mile formally refers to the survey mile, about 3.219 mm (1/8 inch) longer than the international mile (the international mile is exactly 0.0002% less than the US survey mile).

### Mile per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MI-PER-HR  http://qudt.org/2.1/vocab/unit Miles per hour is an imperial unit of speed expressing the number of statute miles covered in one hour. It is currently the standard unit used for speed limits, and to express speeds generally, on roads in the United Kingdom and the United States. A common abbreviation is mph or MPH.

### Mile per Secondni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MI-PER-SEC 

### Square Mileni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MI2  http://qudt.org/2.1/vocab/unit The square mile (abbreviated as sq mi and sometimes as mi) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to the number of miles on each side squared. For instance, 20 miles square (20 × 20 miles) is equal to 400 square miles. One square mile is equivalent to: 4,014,489,600 square inches 27,878,400 square feet, 3,097,600 square yards, 640 acres, 258.9988110336 hectares, 2560 roods, 25,899,881,103.36 square centimetres, 2,589,988.110336 square metres, 2.589988110336 square kilometres When applied to a portion of the earth's surface, which is curved rather than flat, 'square mile' is an informal synonym for section.

### Minuteni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/MIN  http://qudt.org/2.1/vocab/unit A minute is a unit of measurement of time. The minute is a unit of time equal to 1/60 (the first sexagesimal fraction of an hour or 60 seconds. In the UTC time scale, a minute on rare occasions has 59 or 61 seconds; see leap second. The minute is not an SI unit; however, it is accepted for use with SI units. The SI symbol for minute or minutes is min (for time measurement) or the prime symbol after a number, e.g. 5' (for angle measurement, even if it is informally used for time).

### Nautical Mileni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MI_N  http://qudt.org/2.1/vocab/unit A unit of distance used primarily at sea and in aviation. The nautical mile is defined to be the average distance on the Earth's surface represented by one minute of latitude. In 1929 an international conference in Monaco redefined the nautical mile to be exactly 1852 meters or 6076.115 49 feet, a distance known as the international nautical mile. The international nautical mile equals about 1.1508 statute miles. There are usually 3 nautical miles in a league. The unit is designed to equal 1/60 degree, although actual degrees of latitude vary from about 59.7 to 60.3 nautical miles. (Note: using data from the Geodetic Reference System 1980, the "true" length of a nautical mile would be 1852.216 meters.)

### Maxwellni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MX  http://qudt.org/2.1/vocab/unit "Maxwell" is a C.G.S System unit for 'Magnetic Flux' expressed as $$Mx$$.

### MebiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MebiBIT 

### MebiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MebiBIT-PER-SEC 

### MebiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MebiBYTE 

### MebiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MebiBYTE-PER-SEC 

### Mega Electron Voltni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MegaEV  http://qudt.org/2.1/vocab/unit $$\textbf{Mega Electron Volt} is a unit for 'Energy And Work' expressed as \(MeV$$.

### Megahertzni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MegaHZ  http://qudt.org/2.1/vocab/unit "Megahertz" is a C.G.S System unit for 'Frequency' expressed as $$MHz$$.

### Megajouleni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MegaJ  http://qudt.org/2.1/vocab/unit

### Megaohmni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MegaOHM  http://qudt.org/2.1/vocab/unit

### Megavoltni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MegaV  http://qudt.org/2.1/vocab/unit

### MegaWni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MegaW  http://qudt.org/2.1/vocab/unit

### microampereni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MicroA  http://qudt.org/2.1/vocab/unit

### MicroCoulombni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MicroC  http://qudt.org/2.1/vocab/unit A MicroCoulomb is $$10^{-6} C$$.

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MicroFARAD  http://qudt.org/2.1/vocab/unit The "microfarad" (symbolized $$\mu F$$) is a unit of capacitance, equivalent to 0.000001 (10 to the -6th power) farad. The microfarad is a moderate unit of capacitance. In utility alternating-current (AC) and audio-frequency (AF) circuits, capacitors with values on the order of $$1 \mu F$$ or more are common. At radio frequencies (RF), a smaller unit, the picofarad (pF), is often used.

### Microgramni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MicroGM  http://qudt.org/2.1/vocab/unit

### Microhenryni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MicroH  http://qudt.org/2.1/vocab/unit The SI derived unit for inductance is the henry. 1 henry is equal to 1000000 microhenry.

### Micrometerni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MicroM  http://qudt.org/2.1/vocab/unit "Micrometer" is a unit for 'Length' expressed as $$microm$$.

### microsecondni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MicroSEC  http://qudt.org/2.1/vocab/unit "Microsecond" is a unit for 'Time' expressed as $$microsec$$.

### Microvoltni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MicroV  http://qudt.org/2.1/vocab/unit

### Microwattni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MicroW  http://qudt.org/2.1/vocab/unit

### MilliAmpereni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliA  http://qudt.org/2.1/vocab/unit

### Millibarni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliBAR  http://qudt.org/2.1/vocab/unit The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to $$100,000 Pa = 1 bar \approx 750.0616827 Torr$$. Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.

### MilliCoulombni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MilliC  http://qudt.org/2.1/vocab/unit A MilliCoulomb is $$10^{-3} C$$.

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliFARAD  http://qudt.org/2.1/vocab/unit

### Milligramni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliGM  http://qudt.org/2.1/vocab/unit

### Millihenryni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MilliH  http://qudt.org/2.1/vocab/unit A unit of inductance equal to one thousandth of a henry.

### Millilitre Per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliL-PER-HR  http://qudt.org/2.1/vocab/unit

### Millilitre Per Secondni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliL-PER-SEC  http://qudt.org/2.1/vocab/unit

### Millimeterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MilliM  http://qudt.org/2.1/vocab/unit The millimetre (International spelling as used by the International Bureau of Weights and Measures) or millimeter (American spelling) (SI unit symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. It is equal to 1000 micrometres or 1000000 nanometres. A millimetre is equal to exactly 5/127 (approximately 0.039370) of an inch.

### Millimetre Squaredni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliM2  http://qudt.org/2.1/vocab/unit

### Cubic Millimeterni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MilliM3  http://qudt.org/2.1/vocab/unit A metric measure of volume or capacity equal to a cube 1 millimeter on each edge

### Millimeter of Mercuryni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliM_HG  http://qudt.org/2.1/vocab/unit The millimeter of mercury is defined as the pressure exerted at the base of a column of fluid exactly 1 mm high, when the density of the fluid is exactly $$13.5951 g/cm^{3}$$, at a place where the acceleration of gravity is exactly $$9.80665 m/s^{2}$$.

### Milliohmni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliOHM  http://qudt.org/2.1/vocab/unit

### millisecondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/MilliSEC  http://qudt.org/2.1/vocab/unit "Millisecond" is an Imperial unit for 'Time' expressed as $$ms$$.

### Millivoltni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliV  http://qudt.org/2.1/vocab/unit

### MilliWni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/MilliW  http://qudt.org/2.1/vocab/unit

### Newtonni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/N  http://qudt.org/2.1/vocab/unit The "Newton" is the SI unit of force. A force of one newton will accelerate a mass of one kilogram at the rate of one meter per second per second. The newton is named for Isaac Newton (1642-1727), the British mathematician, physicist, and natural philosopher. He was the first person to understand clearly the relationship between force (F), mass (m), and acceleration (a) expressed by the formula $$F = m \cdot a$$.

### Newton Meterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/N-M  http://qudt.org/2.1/vocab/unit "Torque" is the tendency of a force to cause a rotation, is the product of the force and the distance from the center of rotation to the point where the force is applied. Torque has the same units as work or energy, but it is a different physical concept. To stress the difference, scientists measure torque in newton meters rather than in joules, the SI unit of work. One newton meter is approximately 0.737562 pound foot.

### NanoCoulombni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/NanoC  http://qudt.org/2.1/vocab/unit A NanoCoulomb is $$10^{-9} C$$.

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/NanoFARAD  http://qudt.org/2.1/vocab/unit A common metric unit of electric capacitance equal to $$10^{-9} farad$$. This unit was previously called the $$millimicrofarad$$.

### Nanometreni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/NanoM  http://qudt.org/2.1/vocab/unit

### nanosecondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/NanoSEC  http://qudt.org/2.1/vocab/unit A nanosecond is a SI unit of time equal to one billionth of a second (10−9 or 1/1,000,000,000 s). One nanosecond is to one second as one second is to 31.69 years. The word nanosecond is formed by the prefix nano and the unit second.

### Ohmni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/OHM  http://qudt.org/2.1/vocab/unit The \textit{ohm} is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. $$\Omega \equiv\ \frac{\text{V}}{\text{A}}\ \equiv\ \frac{\text{volt}}{\text{amp}}\ \equiv\ \frac{\text{W}}{\text {A}^{2}}\ \equiv\ \frac{\text{watt}}{\text{amp}^{2}}\ \equiv\ \frac{\text{H}}{\text {s}}\ \equiv\ \frac{\text{henry}}{\text{second}}$$

### Imperial Ounce Forceni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/OZ_F  http://qudt.org/2.1/vocab/unit "Ounce Force" is an Imperial unit for 'Force' expressed as $$ozf$$.

### Fluid Ounce (UK)ni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/OZ_VOL_UK  http://qudt.org/2.1/vocab/unit $$\textit{Imperial Ounce}$$ is an Imperial unit for 'Liquid Volume' expressed as $$oz$$.

### US Liquid Ounceni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/OZ_VOL_US  http://qudt.org/2.1/vocab/unit "US Liquid Ounce" is a unit for 'Liquid Volume' expressed as $$oz$$.

### Pascalni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/PA  http://qudt.org/2.1/vocab/unit The SI unit of pressure. The pascal is the standard pressure unit in the MKS metric system, equal to one newton per square meter or one "kilogram per meter per second per second." The unit is named for Blaise Pascal (1623-1662), French philosopher and mathematician, who was the first person to use a barometer to measure differences in altitude.

### Percentni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/PERCENT  http://qudt.org/2.1/vocab/unit "Percent" is a unit for 'Dimensionless Ratio' expressed as $$\%$$.

### Parts per millionni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/PPM  http://qudt.org/2.1/vocab/unit Dimensionless unit for concentration. Recommended practice is to use specific units such as $$ug/l$$.

### PSIni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/PSI  http://qudt.org/2.1/vocab/unit

### PicoCoulombni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/PicoC  http://qudt.org/2.1/vocab/unit A PicoCoulomb is $$10^{-12} C$$.

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/PicoFARAD  http://qudt.org/2.1/vocab/unit "PicoF" is a common unit of electric capacitance equal to $$10^{-12} farad$$. This unit was formerly called the micromicrofarad.

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/RAD  http://qudt.org/2.1/vocab/unit The radian and steradian are special names for the number one that may be used to convey information about the quantity concerned. In practice the symbols rad and sr are used where appropriate, but the symbol for the derived unit one is generally omitted in specifying the values of dimensionless quantities.

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/RAD-PER-HR  http://qudt.org/2.1/vocab/unit "Radian per Hour" is a unit for 'Angular Velocity' expressed as $$rad/h$$.

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/RAD-PER-MIN  http://qudt.org/2.1/vocab/unit Radian Per Minute (rad/min) is a unit in the category of Angular velocity. It is also known as radians per minute, radian/minute. Radian Per Minute (rad/min) has a dimension of aT-1 where T is time. It can be converted to the corresponding standard SI unit rad/s by multiplying its value by a factor of 0.0166666666667.

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/RAD-PER-SEC  http://qudt.org/2.1/vocab/unit "Radian per Second" is the SI unit of rotational speed (angular velocity), and, also the unit of angular frequency. The radian per second is defined as the change in the orientation of an object, in radians, every second.

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/RAD-PER-SEC2  http://qudt.org/2.1/vocab/unit Angular acceleration is the rate of change of angular velocity. In SI units, it is measured in radians per second squared ($$rad/s^2$$), and is usually denoted by the Greek letter $$\alpha$$.

### Revolutionni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/REV  http://qudt.org/2.1/vocab/unit "Revolution" is a unit for 'Plane Angle' expressed as $$rev$$.

### Revolution per Hourni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/REV-PER-HR  http://qudt.org/2.1/vocab/unit "Revolution per Hour" is a unit for 'Angular Velocity' expressed as $$rev/h$$.

### Revolution per Minuteni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/REV-PER-MIN  http://qudt.org/2.1/vocab/unit "Revolution per Minute" is a unit for 'Angular Velocity' expressed as $$rev/min$$.

### Revolution per Secondni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/REV-PER-SEC  http://qudt.org/2.1/vocab/unit "Revolution per Second" is a unit for 'Angular Velocity' expressed as $$rev/s$$.

### Revolution per Second Squaredni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/REV-PER-SEC2  http://qudt.org/2.1/vocab/unit "Revolution per Second Squared" is a C.G.S System unit for 'Angular Acceleration' expressed as $$rev-per-s^2$$.

### Siemens per Meterni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/S-PER-M 

### Secondni

Class(es)
rdfs:Datatype
qudt:Unit
URI  http://qudt.org/vocab/unit/SEC  http://qudt.org/2.1/vocab/unit The $$Second$$ (symbol: $$s$$) is the base unit of time in the International System of Units (SI) and is also a unit of time in other systems of measurement. Between the years1000 (when al-Biruni used seconds) and 1960 the second was defined as $$1/86400$$ of a mean solar day (that definition still applies in some astronomical and legal contexts). Between 1960 and 1967, it was defined in terms of the period of the Earth's orbit around the Sun in 1900, but it is now defined more precisely in atomic terms. Under the International System of Units (via the International Committee for Weights and Measures, or CIPM), since 1967 the second has been defined as the duration of $${9192631770}$$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.In 1997 CIPM added that the periods would be defined for a caesium atom at rest, and approaching the theoretical temperature of absolute zero, and in 1999, it included corrections from ambient radiation.

### Slugni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/SLUG  http://qudt.org/2.1/vocab/unit The slug is a unit of mass associated with Imperial units. It is a mass that accelerates by $$1 ft/s$$ when a force of one pound-force ($$lbF$$) is exerted on it. With standard gravity $$gc = 9.80665 m/s$$, the international foot of $$0.3048 m$$ and the avoirdupois pound of $$0.45359237 kg$$, one slug therefore has a mass of approximately $$32.17405 lbm$$ or $$14.593903 kg$$. At the surface of the Earth, an object with a mass of 1 slug exerts a force of about $$32.17 lbF$$ or $$143 N$$.

### Teslani

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/T  http://qudt.org/2.1/vocab/unit The SI unit of flux density (or field intensity) for magnetic fields (also called the magnetic induction). The intensity of a magnetic field can be measured by placing a current-carrying conductor in the field. The magnetic field exerts a force on the conductor, a force which depends on the amount of the current and on the length of the conductor. One tesla is defined as the field intensity generating one newton of force per ampere of current per meter of conductor. Equivalently, one tesla represents a magnetic flux density of one weber per square meter of area. A field of one tesla is quite strong: the strongest fields available in laboratories are about 20 teslas, and the Earth's magnetic flux density, at its surface, is about 50 microteslas. The tesla, defined in 1958, honors the Serbian-American electrical engineer Nikola Tesla (1856-1943), whose work in electromagnetic induction led to the first practical generators and motors using alternating current. $$T = V\cdot s \cdot m^{-2} = N\cdot A^{-1}\cdot m^{-1} = Wb\cdot m^{-1} = kg \cdot C^{-1}\cdot s^{-1}\cdot A^{-1} = kg \cdot s^{-2}\cdot A^{-1} = N \cdot s \cdot C^{-1}\cdot m^{-1}$$ where, $$\\$$ $$A$$ = ampere, $$C$$=coulomb, $$m$$ = meter, $$N$$ = newton, $$s$$ = second, $$T$$ = tesla, $$Wb$$ = weber

### Tonneni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TONNE  http://qudt.org/2.1/vocab/unit

### Ton Force (US Short)ni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TON_F_US  http://qudt.org/2.1/vocab/unit

### TebiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TebiBIT 

### TebiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TebiBIT-PER-SEC 

### TebiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TebiBYTE 

### TebiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/TebiBYTE-PER-SEC 

### Unitlessni

Class(es)
qudt:Unit
qudt:DimensionlessUnit
URI  http://qudt.org/vocab/unit/UNITLESS  http://qudt.org/2.1/vocab/unit An explicit unit to say something has no units.

### Voltni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/V  http://qudt.org/2.1/vocab/unit $$\textit{Volt} is the SI unit of electric potential. Separating electric charges creates potential energy, which can be measured in energy units such as joules. Electric potential is defined as the amount of potential energy present per unit of charge. Electric potential is measured in volts, with one volt representing a potential of one joule per coulomb of charge. The name of the unit honors the Italian scientist Count Alessandro Volta (1745-1827), the inventor of the first battery. The volt also may be expressed with a variety of other units. For example, a volt is also equal to one watt per ampere (W/A) and one joule per ampere per second (J/A/s).$$

### Wattni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/W  http://qudt.org/2.1/vocab/unit $$The SI unit of power. Power is the rate at which work is done, or (equivalently) the rate at which energy is expended. One watt is equal to a power rate of one joule of work per second of time. This unit is used both in mechanics and in electricity, so it links the mechanical and electrical units to one another. In mechanical terms, one watt equals about 0.001 341 02 horsepower (hp) or 0.737 562 foot-pound per second (lbf/s). In electrical terms, one watt is the power produced by a current of one ampere flowing through an electric potential of one volt. The name of the unit honors James Watt (1736-1819), the British engineer whose improvements to the steam engine are often credited with igniting the Industrial Revolution.$$

### Watt per Square Meterni

Class(es)
rdfs:Datatype
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/W-PER-M2  http://qudt.org/2.1/vocab/unit "Watt per Square Meter} is a unit of irradiance defined as the power received per area. This is a unit in the category of Energy flux. It is also known as watts per square meter, watt per square metre, watts per square metre, watt/square meter, watt/square metre. This unit is commonly used in the SI unit system. Watt Per Square Meter ($$W/m^2$$) has a dimension of $$MT^{-3"$$ where M is mass, and T is time. This unit is the standard SI unit in this category.

### Weberni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/WB  http://qudt.org/2.1/vocab/unit The SI unit of magnetic flux. "Flux" is the rate (per unit of time) at which something crosses a surface perpendicular to the flow. The weber is a large unit, equal to $$10^{8}$$ maxwells, and practical fluxes are usually fractions of one weber. The weber is the magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second. In SI base units, the dimensions of the weber are $$(kg \cdot m^2)/(s^2 \cdot A)$$. The weber is commonly expressed in terms of other derived units as the Tesla-square meter ($$T \cdot m^2$$), volt-seconds ($$V \cdot s$$), or joules per ampere ($$J/A$$).

### Yardni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YD  http://qudt.org/2.1/vocab/unit A yard is a unit of length in several different systems including United States customary units, Imperial units and the former English units. It is equal to 3 feet or 36 inches. Under an agreement in 1959 between Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States, the yard (known as the "international yard" in the United States) was legally defined to be exactly 0.9144 metres.

### Square Yardni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/YD2  http://qudt.org/2.1/vocab/unit The square yard is an imperial/US customary unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre outside of the U.S. , Canada and the U.K. It is defined as the area of a square with sides of one yard in length. (Gaj in Hindi).

### Cubic Yardni

Class(es)
qudt:Unit
qudt:DerivedUnit
URI  http://qudt.org/vocab/unit/YD3  http://qudt.org/2.1/vocab/unit A cubic yard is an Imperial / U.S. customary unit of volume, used in the United States, Canada, and the UK. It is defined as the volume of a cube with sides of 1 yard in length.

### Yearni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YR  http://qudt.org/2.1/vocab/unit A year is any of the various periods equated with one passage of Earth about the Sun, and hence of roughly 365 days. The familiar calendar has a mixture of 365- and 366-day years, reflecting the fact that the time for one complete passage takes about 365¼ days; the precise value for this figure depends on the manner of defining the year.

### YobiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YobiBIT 

### YobiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YobiBIT-PER-SEC 

### YobiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YobiBYTE 

### YobiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/YobiBYTE-PER-SEC 

### ZebiBITni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ZebiBIT 

### ZebiBIT-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ZebiBIT-PER-SEC 

### ZebiBYTEni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ZebiBYTE 

### ZebiBYTE-PER-SECni

Class(es)
qudt:Unit
URI  http://qudt.org/vocab/unit/ZebiBYTE-PER-SEC 

## Namespaces ↑

default (:)
https://w3id.org/rec/units/
core
http://www.linkedmodel.org/owl/schema/core#
cpannotationschema
http://www.ontologydesignpatterns.org/schemas/cpannotationschema.owl#
dc
http://purl.org/dc/elements/1.1/
https://w3id.org/rec/metadata/
ns
http://creativecommons.org/ns#
o2o
https://karlhammar.com/owl2oas/o2o.owl#
owl
http://www.w3.org/2002/07/owl#
prov
http://www.w3.org/ns/prov#
quantitykind
http://qudt.org/vocab/quantitykind/
qudt
http://qudt.org/schema/qudt/
rdf
http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs
http://www.w3.org/2000/01/rdf-schema#
sdo
http://schema.org/
skos
http://www.w3.org/2004/02/skos/core#
terms
http://purl.org/dc/terms/
unit
http://qudt.org/vocab/unit/
vaem
http://www.linkedmodel.org/schema/vaem#
vann
http://purl.org/vocab/vann/
voag
http://voag.linkedmodel.org/schema/voag#
xsd
http://www.w3.org/2001/XMLSchema#

## Legend

 c Classes op Object Properties fp Functional Properties dp Data Properties dp Annotation Properties p Properties ni Named Individuals