#
Measurement Unit
^{en}

Types in this commons are generally-applicable units. They include some compound value types such as Rectangle Size and Dated Money Value, and more traditional units and their dimensions (which can be used for unit-valued properties on other types).For a unit type to be usable for other properties, its dimension must be an instance of Common Dimension, and it must have a value for its Canonical Abbreviation property. [ - ]

# What are Types? Types

Unit of Absorbed Dose Rate | /measurement_unit/absorbed_dose_rate_unit | 2 | 1 |
A unit of absorbed dose is a measure of the rate of energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium per unit of time. |

Unit of Absorbed Dose | /measurement_unit/absorbed_dose_unit | 2 | 2 |
A unit of absorbed dose is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium. |

Unit of Acceleration | /measurement_unit/acceleration_unit | 2 | 3 |
A unit of acceleration is a measure of the change in velocity over time. |

Unit of Amount Concentration | /measurement_unit/amount_concentration_unit | 2 | 5 |
A unit of amount concentration is a measure of the concentration of a solute in a solution, or of any molecular, ionic, or atomic species in a given volume. |

Unit of Plane Angle | /measurement_unit/angle_unit | 2 | 7 |
A unit of plane angle is a measure of the inclination to each other, in a plane, of two lines which meet each other, and do not lie straight with respect to each other. |

Unit of Angular Acceleration | /measurement_unit/angular_acceleration_unit | 2 | 1 |
Units of angular acceleration measure the change in angular velocity over time. |

Unit of Angular Frequency | /measurement_unit/angular_velocity_unit | 2 | 2 |
Units of angular frequency are used to measure rates of rotation. |

Unit of Area | /measurement_unit/area_unit | 2 | 15 |
A Unit Of Area is a measurement of 2-dimensional planar size. Units should have their equivalent given in the SI base unit, square meters. |

Unit of Capacitance | /measurement_unit/capacitance_unit | 2 | 1 |
A unit of capacitance is a unit of measurement that measures the amount of electric charge stored (or separated) for a given electric potential. |

Unit of Catalytic Activity | /measurement_unit/catalytic_activity_unit | 2 | 2 |
Units of catalytic activity are used to describe how quickly a catalyst acts during catalysis. |

Unit of Catalytic Concentration | /measurement_unit/catalytic_concentration_unit | 2 | 1 |
Units of catalytic concentration are used to describe the intensity of a catalytic process. It uses a unit of catalytic activity (eg a katal or enzyme unit) in relation to a volume of space. |

Unit of Charge | /measurement_unit/charge_unit | 2 | 6 |
A unit or charge measures the quantity of charge that has passed through the cross-section of an electrical conductor. |

Common Dimension | /measurement_unit/common_dimension | 0 | 52 |
These dimensions are the ones that appear for properties that have an expected type of integer or floating point number in schema editor. |

Unit of Conductance | /measurement_unit/conductance_unit | 2 | 3 |
A unit of conductance is a measure of how easily electricity flows along a certain path through an electrical element. |

Unit of Current Density | /measurement_unit/current_density_unit | 2 | 1 |
A unit of current density is a measure of the density of flow of a conserved electrical charge. |

Unit of Electric Current | /measurement_unit/current_unit | 2 | 3 |
A unit of electric current measures the rate of flow of an electric charge. |

Unit of Data Size | /measurement_unit/data_size_unit | 1 | 42 |
A Unit of Data Size is a measure of information storage, used for computer file sizes, data transmission, and information theory. All units should have their equivalent given in bytes (e.g., a bit is 0.125 bytes). |

Dimension | /measurement_unit/dimension | 3 | 110 | |

Unit of Length | /measurement_unit/distance_unit | 2 | 71 |
A Unit Of Length is any measure used for linear distance (height, width, etc.). If the unit is fixed, such as the American inch, its length in the SI base unit, meters, should be given. If it is variable or unknown, such as the Biblical cubit, then the meter equivalence should not be specified. |

Unit of Dose Equivalence | /measurement_unit/dose_equivalence_unit | 2 | 1 |
A unit of dose equivalence is a measure of the radiation dose to tissue where an attempt has been made to allow for the different relative biological effects of different types of ionizing radiation. |

Unit of Electric Charge Density | /measurement_unit/electric_charge_density_unit | 2 | 1 |
Units of electric charge density measure the volumetric charge density of a space; that is, the average amount of electric charge within a volume. |

Unit of Electric Field Strength | /measurement_unit/electric_field_strength_unit | 2 | 2 |
Electric field strength is a measure of the electric force exerted by an electric field on other electrically charged objects. |

Unit of Electric Flux Density | /measurement_unit/electric_flux_density_unit | 2 | 1 |
Units of electric flux density are used in physics, specifically in the study of electromagnetism, and measure the electric charge moving through an area; the units are equivalent to planar charge density (charge per area). |

Unit of Energy Density | /measurement_unit/energy_density_unit | 2 | 1 |
Units of energy density measure the amount of energy stored in a given system or region of space per unit volume and/or mass. |

Unit of Energy | /measurement_unit/energy_unit | 2 | 20 |
A Unit Of Energy is a measure of the capacity for work. All units should have their equivalent given in the SI base unit, joules. |

Unit of Exposure | /measurement_unit/exposure_unit | 2 | 1 |
Units of exposure measure ionizing radiation delivery, in the amount of charge delivered per mass of tissue. |

Unit of Moment of Force | /measurement_unit/force_moment_unit | 2 | 3 |
Units of moment of force -- also known simply as moment -- are used to measure torque, or the magnitude of force applied to a rotational system at a distance from the axis of rotation. |

Unit of Fuel Economy | /measurement_unit/fuel_economy_unit | 3 | 4 |
A unit of fuel economy measures the distance traveled per unit of fuel used. |

Unit of Heat Capacity | /measurement_unit/heat_capacity_unit | 2 | 1 |
Units of heat capacity measure the heat energy required to increase the temperature of an object by a certain amount. |

Unit of Illuminance | /measurement_unit/illuminance_unit | 2 | 1 |
A unit of illuminance measures the total luminous flux incident on a surface, per unit area. |

Unit of Inductance | /measurement_unit/inductance_unit | 2 | 1 |
A unit of inductance measures the degree to which a change in the electric current through a circuit induces an electromotive force (EMF) that opposes the change in current. |

Unit of Inverse Temperature | /measurement_unit/inverse_temperature_unit | 2 | 3 |
A unit of inverse temperature is a measure of how the degree to which the system that the heat is delivered to will be impacted. |

Unit of Irradiance | /measurement_unit/irradiance_unit | 2 | 1 |
Units of irradiance measure the power of electromagnetic radiation at a surface, per unit area. |

Unit of Luminance | /measurement_unit/luminance_unit | 2 | 4 |
A unit of luminance measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. |

Unit of Luminous Flux | /measurement_unit/luminous_flux_unit | 2 | 1 |
A unit of luminous flux is a measure of the perceived power of light. It differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light. |

Unit of Luminous Intensity | /measurement_unit/luminous_intensity_unit | 2 | 1 |
A unit of luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. |

Unit of Magnetic Field Strength | /measurement_unit/magnetic_field_strength_unit | 2 | 2 |
A unit of magnetic field strength is a measure of the intensity of a magnetic field. |

Unit of Magnetic Flux Density | /measurement_unit/magnetic_flux_density_unit | 2 | 2 |
A unit of magnetic flux density is the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow. |

Unit of Magnetic Flux | /measurement_unit/magnetic_flux_unit | 2 | 1 |
A unit of magnetic flux is a measure of quantity of magnetism, taking into account the strength and the extent of a magnetic field. |

Unit of Mass | /measurement_unit/mass_unit | 2 | 36 |
A Unit of Mass is any measure used for mass. Units used for equivalently for weight as a proxy for mass are also appropriate here, but units used primarily for force are not. All units should have their equivalent given in the SI base unit, kilograms. |

Measurement System | /measurement_unit/measurement_system | 73 | 42 |
AMeasurement System is an interrelated set of units for measuring the world: time and space, mass, speed, radiation, etc. A system may be as comprehensive as the metric system, or as limited in scope as the astronomical units of length or the troy system of weights. |

Measuring Instrument | /measurement_unit/measuring_instrument | 3 | 120 |
This type is for any type of device that can be said to measure something. |

Unit of Molar Energy | /measurement_unit/molar_energy_unit | 2 | 2 |
Units of molar energy are used to describe the amount of energy existing in a mole of a given substance. |

Unit of Molar Heat Capacity | /measurement_unit/molar_heat_capacity_unit | 2 | 1 |
A unit of molar heat capacity measures the amount of heat energy required to increase the temperature of one mole of a substance by one degree Kelvin. |

Unit of Molar Volume | /measurement_unit/molar_volume_unit | 2 | 1 |
Molar volume is the amount of space occupied by one mole of any substance. |

Unit of Permeability | /measurement_unit/permeability_unit | 2 | 1 |
Units of permeability are used to describe how permeable a substance is to magnetic energy. |

Unit of Permittivity | /measurement_unit/permittivity_unit | 2 | 1 |
Units of permittivity are used to describe how an electric field is affected by the medium in which the field is operating. |

Unit of Potential | /measurement_unit/potential_unit | 2 | 1 |
A unit of potential is a measure of electric potential which is the potential energy divided by the charge that is associated with a static (time-invariant) electric field. |

Unit of Power | /measurement_unit/power_unit | 2 | 10 |
A Unit Of Power is a measure of energy produced, expended, or used over time. All units should have their equivalent given in the SI base unit, watts. |

Unit of Pressure | /measurement_unit/pressure_unit | 2 | 19 |
A Unit Of Pressure is a measure of force distributed over area. All units should have their equivalent given in the SI base unit, pascals. |

Unit of Radiance | /measurement_unit/radiance_unit | 2 | 1 |
Units of radiance are used to measurethe amount of light that passes through or is emitted from a particular area. |

Unit of Radiant Intensity | /measurement_unit/radiant_intensity_unit | 2 | 1 |
Radiant intensity is the measure of intensity of electromagnetic radation, in power units per solid angle. |

Unit of Radioactivity | /measurement_unit/radioactivity_unit | 2 | 2 |
A unit of radioactivity is a measure of the rate of radioactive decay which is the process in which an unstable atomic nucleus spontaneously loses energy by emitting ionizing particles and radiation. |

Unit of Resistance | /measurement_unit/resistance_unit | 2 | 1 |
A unit of resistance is a measure of an object's opposition to the passage of a steady electric current. |

Unit of Solid Angle | /measurement_unit/solid_angle_unit | 2 | 2 |
A unit of solid angle is a measure of the two-dimensional angle in three-dimensional space that an object subtends at a point. It is a measure of how large that object appears to an observer looking from that point. |

Unit of Specific Energy | /measurement_unit/specific_energy_unit | 2 | 2 |
Units of specific energy measure energy for a given mass of a substance. |

Unit of Specific Heat Capacity | /measurement_unit/specific_heat_capacity_unit | 2 | 3 |
Units of specific heat capacity measure the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval. |

Unit of Specific Volume | /measurement_unit/specific_volume_unit | 2 | 1 |
A unit of specific volume is a measure of the volume occupied by a unit of mass of a material. |

Unit of Speed | /measurement_unit/speed_unit | 2 | 8 |
A Unit Of Speed measures speed or velocity, the ratio of linear distance to time. All units should have their equivalent given in the SI base unit, m/s. |

Unit of Amount of Substance | /measurement_unit/substance_unit | 2 | 5 |
A unit of amount of substance is a measure of the number of some specified elementary entities (usually either atoms, or molecules, or ions, or electrons) present in the sample, but where this number is expressed in terms of some standard batch size. |

Unit of Surface Tension | /measurement_unit/surface_tension_unit | 2 | 1 |
Units of surface tension are used to measure the amount of surface tension of a given liquid. |

Unit of Temperature | /measurement_unit/temperature_unit | 3 | 4 |
AUnit Of Temperature is a linear measure of heat; that is, arithmetically analogous to the SI base unit, Kelvins.The Zero Point in Kelvins is the temperature, in Kelvins, which is 0 in the given scale; the Kelvins Multiplier is the size of a degree in the given scale, in Kelvins.TheZero Point in Kelvins and Kelvins Multiplier properties should be used such that a measure in the given units, times the multiplier, plus the zero point, gives the temperature in Kelvins. For example, (32 F 0.55555 K/F) + 255.37222 K = 273.15 K, the proper freezing point of water. |

Unit of Thermal Conductivity | /measurement_unit/thermal_conductivity_unit | 2 | 1 |
Units of thermal conductivity are used to express how easily a substance transmits heat. |

Unit of Time | /measurement_unit/time_unit | 2 | 45 |
A Unit of Time is a measurement unit used to measure duration passing; each units equivalent should be given in the SI base unit, seconds, if possible; variable-length units (such as months) may have no specific equivalent. Particular lengths of time are not appropriate. |

Unit of Brake Specific Fuel Consumption | /measurement_unit/unit_of_brake_specific_fuel_consumption | 2 | 2 |
Units of brake specific fuel consumption measure Brake specific fuel consumption. |

Unit of Cargo Capacity | /measurement_unit/unit_of_cargo_capacity | 1 | 1 |
A unit of cargo capacity measures the cargo capacity of container ships and terminals. The base unit is the Twenty-foot equivalent unit (TEU), an inexact, but standard, container size. |

Unit of Conductivity | /measurement_unit/unit_of_conductivity | 2 | 2 |
Units of conductivity (aka specific conductance) are used to express the conductivity of a solution. |

Unit of Data Transmission Rate | /measurement_unit/unit_of_data_transmission_rate | 2 | 13 |
Units of data transmission rate are used to measure the amount of data being transmitted over some medium. |

Unit of Density | /measurement_unit/unit_of_density | 2 | 2 |
A Unit of Density is a measure of mass distributed over volume. All units should have their equivalent given in the SI base unit, kilograms per cubic meter. |

Unit of Force | /measurement_unit/unit_of_force | 2 | 6 |
A Unit of Force is a measure of the change of momentum of an object over time, or of the influence that induces such a change. All units should have their equivalent given in the SI base unit, newtons. |

Unit of frequency | /measurement_unit/unit_of_frequency | 2 | 43 |
Includes units that measure frequency. Included is the SI unit Hertz, as well as derivations such as Megahertz and Gigahertz. Clock and calendar scale frequencies such as hourly, daily and weekly are included, as well as longer frequencies such as monthly and yearly that cannnot be expressed deterministically because of their variable definitions. |

Unit of Molar Mass | /measurement_unit/unit_of_molar_mass | 2 | 1 |
Units of molar mass are used to measure the mass of one mole of a substance. |

Unit of Resistivity | /measurement_unit/unit_of_resistivity | 2 | 2 |
Units of resistivity measure how strongly a material opposes the flow of electric current. |

Unit of Specific Fuel Consumption | /measurement_unit/unit_of_specific_fuel_consumption | 2 | 1 |
Units of specific fuel consumption measure the fuel efficiency of an engine design with respect to thrust output. |

Unit of Surface Density | /measurement_unit/unit_of_surface_density | 2 | 1 |
A unit of surface density is a measure of the mass of an object per unit of surface area. |

Unit of Symbol Rate | /measurement_unit/unit_of_symbol_rate | 2 | 1 |
Units of symbol rate are used to measure the number of symbol changes made to a transmission medium in a signal. |

Unit of Volumetric Flow Rate | /measurement_unit/unit_of_volumetric_flow_rate | 2 | 2 |
Units of volumetric flow rate measure the volume of fluid which passes through a given surface per unit time. |

Unit of Viscosity | /measurement_unit/viscosity_unit | 2 | 1 |
Units of viscosity measure the viscosity, or "thickness", of a fluid. Technically, viscosity is a measure of a fluid's resistance to being deformed by shear stress or extensional stress. |

Unit Of Volume | /measurement_unit/volume_unit | 2 | 50 |
A Unit Of Volume is a measurement of 3-dimensional spatial size. Units should have their equivalent given in the SI base unit, cubic meters (which, please note, is 1,000 liters). |

Unit of Volumetric Heat Capacity | /measurement_unit/volumetric_heat_capacity_unit | 2 | 1 |
Volumetric heat capacity is the ability of a given volume of a substance to store internal energy while undergoing a temperature change. This type is for units used to describe this capacity. |

Unit of Wavenumber | /measurement_unit/wavenumber_unit | 2 | 1 |
A unit of wavenumber is a measure of the number of wavelengths per unit distance, that is, 1/λ where λ=wavelength. |

# What are Mediators? Mediators

Adjusted money value | /measurement_unit/adjusted_money_value | 7 | 16,204 |
For reporting both measured and adjusted money values |

Dated BTU | /measurement_unit/dated_btu | 3 | - |
This type holds statistics about energy in British thermal units. |

Dated cubic meters | /measurement_unit/dated_cubic_meters | 3 | 2,067 |
This type holds the volume in m3 (e.g. water resources available) |

Dated days | /measurement_unit/dated_days | 3 | 2,133 |
This type holds the time (in number of days) to do something (e.g. establish a business) |

Dated Float | /measurement_unit/dated_float | 3 | 358,540 |
This is a compound-value type that can be used for recording decimal (floating point) numbers that have a date component. Because this is a general type, it is mainly useful for dimensionless properties (i.e. those that do not require a specific unit of measure). If you need a dated floating-point number type that has a specific unit, it is easiest to create your own for that purpose. |

Dated index value | /measurement_unit/dated_index_value | 4 | 6,945 |
Index values relative to a base period |

Dated Integer | /measurement_unit/dated_integer | 3 | 2,526,145 |
A dated integer is an integer (whole number) that is relevant to a particular date. For instance, "The population of London in 1750" would be a dated integer. |

Dated internet speed | /measurement_unit/dated_internet_speed | 3 | - |
This type holds statistical information about internet connectivity (speed in kbps). |

Dated kg of oil equivalent | /measurement_unit/dated_kgoe | 3 | 10,822 |
This type is used for dated values expressed in kilogram of oil equivalents (Kgoe) as floating point numbers. |

Dated kilowatt-hour | /measurement_unit/dated_kilowatt_hour | 3 | 10,408 |
This type is used for dated values expressed in kilowatt-hours as floating point numbers. |

Dated metric ton | /measurement_unit/dated_metric_ton | 3 | 17,363 |
This type is used for dated values expressed in metric tons as floating point numbers. |

Dated emission intensity | /measurement_unit/dated_metric_tons_per_million_ppp_dollars | 3 | - |
Metric tons (of emissions) per GDP (in million international PPP dollar) |

Dated Money Value | /measurement_unit/dated_money_value | 4 | 188,957 |
A dated money value is used to describe the monetary value of something at a given point in time. For instance, this type could be used to show how prices rise with inflation. It is a compound value type and includes an amount (expressed as a floating point number), a currency, and a date. |

Dated Percentage | /measurement_unit/dated_percentage | 3 | 1,588,453 |
A dated percentage is a decimal (floating point number) that is relevant to a particular date. It is expressed as a percentage and should be divided by 100 before being used in computations. For example: an unemployment rate of 8.5% measured on July 1st, 2007 would be represented by this mediator with a rate value 8.5 - converted to 0.085 in calculations - and a date value of "2007-07-01". |

Dated ratio | /measurement_unit/dated_ratio | 4 | 5 |
This type holds statistical ratios, where the statistics is per X reference population. |

Dimensions | /measurement_unit/dimensions | 3 | 4,806 |
Dimensions is a type used to measure the height, width, and depth of objects. It is used by such types as Artwork to describe the size of objects of that type. |

Floating Point Range | /measurement_unit/floating_point_range | 2 | 574 |
A floating point range is the range between two floating point numbers, eg. "between 0.1 and 99.9". |

Integer Range | /measurement_unit/integer_range | 2 | 2,696 |
An integer range is the range between two integers (whole numbers), eg. "between 1 and 10". |

Integer Ratio | /measurement_unit/integer_ratio | 2 | 1,522 |
This is a compound-value type that can be used to store integer ratios and fractions. |

Monetary Range | /measurement_unit/monetary_range | 5 | 689 |
A Monetary Range is a range of values in a given currency. For instance, "two to three million Australian dollars". This type has a minimum and maximum value, a currency, and also has a date associated with it allowing you to specify monetary ranges that vary over time. |

Money value | /measurement_unit/money_value | 2 | 86,914 |
This type records money values such as "ten thousand US dollars" or "three million lira". It is a compound value type, consisting of a number and a currency. |

Percentage range | /measurement_unit/percentage_range | 2 | - |
This type is for storing a range of percentages. |

Rectangle Size | /measurement_unit/rect_size | 2 | 439,711 |
Rectangle size specifies an areawith width (x) and height (y). It is most commonly used with /common/image to specify the pixel size of an image. X and Y are floats, even though images always use whole numbers. |

Recurring money value | /measurement_unit/recurring_money_value | 5 | 1,391 |
This type can be used to hold monetary values that recur regularly. For example, minimum wages are guaranteed for different periods (hourly, daily, weekly, etc.) in different locations, expenditures may be reported quarterly or annually, etc. |

Time interval | /measurement_unit/time_interval | 2 | 25,974 |
A time interval is the period between two known dates/times. It is specified using the endpoint dates/times. For instance, the time interval for World War 2 would be 1939-1945. |