is non-coherent derived unit of system
inverse of: has coherent derived unit
sub property of: is derived unit of system
range: System of Units
description: This property relates a unit of measure to the unit system in which the unit is derived from the system's base units without proportionality constant of one.
type: ObjectProperty

ISO Dimension vector
subclass of: Quantity Kind Dimension Vector
type: Class

has quantity kind dimension vector numerator part
type: ObjectProperty

QUDT Datatype
subclass of: Restriction
  on property: python name
  max cardinality: 1
subclass of: Restriction
  on property: Javascript name
  max cardinality: 1
informative reference: http://en.wikipedia.org/wiki/Data_type
subclass of: Restriction
  on property: ordered type
  max cardinality: 1
subclass of: Restriction
  on property: java name
  max cardinality: 1
subclass of: Restriction
  on property: cardinality
  max cardinality: 1
informative reference: http://foldoc.org/data+type
subclass of: Restriction
  on property: ordered type
  all values from: Ordered type
subclass of: Restriction
  on property: ODBC name
  max cardinality: 1
subclass of: Restriction
  on property: cardinality
  all values from: Cardinality Type
subclass of: Restriction
  on property: protocol buffers name
  max cardinality: 1
subclass of: Restriction
  on property: matlab name
  max cardinality: 1
subclass of: Restriction
  on property: OLE DB name
  max cardinality: 1
subclass of: Restriction
  on property: Microsoft SQL Server name
  max cardinality: 1
description: A data type is a definition of a set of values (for example, "all integers between 0 and 10"), and the allowable operations on those values; the meaning of the data; and the way values of that type can be stored. Some types are primitive - built-in to the language, with no visible internal structure - e.g. Boolean; others are composite - constructed from one or more other types (of either kind) - e.g. lists, arrays, structures, unions. Object-oriented programming extends this with classes which encapsulate both the structure of a type and the operations that can be performed on it. Some languages provide strong typing, others allow implicit type conversion and/or explicit type conversion.
subclass of: Restriction
  on property: C Language name
  max cardinality: 1
subclass of: Restriction
  on property: basis
  max cardinality: 1
subclass of: Restriction
  on property: ORACLE SQL name
  max cardinality: 1
subclass of: Restriction
  on property: bounded
  max cardinality: 1
subclass of: Restriction
  on property: Vusal Basic name
  max cardinality: 1
subclass of: Restriction
  on property: qudt id
  max cardinality: 1
subclass of: Restriction
  on property: MySQL name
  max cardinality: 1
subclass of: Restriction
  on property: ANSI SQL Name
  max cardinality: 1
type: Class
informative reference: http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Data_type.html
subclass of: Restriction
  on property: basis
  all values from: QUDT Datatype
subclass of: QUDT Concept

ucum case-sensitive code
deprecated: true
sub property of: ucum code
description: ucumCode associates a QUDT unit with with a UCUM case-sensitive code.
type: AnnotationProperty

rationale
range: HTML
type: DatatypeProperty

relevant quantity kind
range: Quantity Kind
type: ObjectProperty

Encoding
subclass of: Restriction
  on property: bytes
  max cardinality: 1
subclass of: Restriction
  on property: bits
  max cardinality: 1
subclass of: QUDT Concept
description: An encoding is a rule or algorithm that is used to convert data from a native, or unspecified form into a specific form that satisfies the encoding rules. Examples of encodings include character encodings, such as UTF-8.
type: Class

is base quantity kind of system
inverse of: has base quantity kind
sub property of: is quantity kind of
type: ObjectProperty

Enumerated Value
subclass of: EnumeratedValue
informative reference: http://en.wikipedia.org/wiki/Enumeration
subclass of: Restriction
  on property: symbol
  max cardinality: 1
type: Class
subclass of: Restriction
  on property: abbreviation
  max cardinality: 1
subclass of: QUDT Datatype
subclass of: Restriction
  on property: qudt description
  max cardinality: 1
description: This class is for all enumerated and/or coded values. For example, it contains the dimension objects that are the basis elements in some abstract vector space associated with a quantity kind system. Another use is for the base dimensions for quantity systems. Each quantity kind system that defines a base set has a corresponding ordered enumeration whose elements are the dimension objects for the base quantity kinds. The order of the dimensions in the enumeration determines the canonical order of the basis elements in the corresponding abstract vector space. An enumeration is a set of literals from which a single value is selected. Each literal can have a tag as an integer within a standard encoding appropriate to the range of integer values. Consistency of enumeration types will allow them, and the enumerated values, to be referred to unambiguously either through symbolic name or encoding. Enumerated values are also controlled vocabularies and as such need to be standardized. Without this consistency enumeration literals can be stated differently and result in data conflicts and misinterpretations. The tags are a set of positive whole numbers, not necessarily contiguous and having no numerical significance, each corresponding to the associated literal identifier. An order attribute can also be given on the enumeration elements. An enumeration can itself be a member of an enumeration. This allows enumerations to be enumerated in a selection. Enumerations are also subclasses of Scalar Datatype. This allows them to be used as the reference of a datatype specification.

guidance
range: HTML
domain: QUDT Concept
type: AnnotationProperty

code
deprecated: true
domain: QUDT Concept
description: A code is a string that uniquely identifies a QUDT concept. The code is constructed from the designator. The use of this property has been deprecated.
type: DatatypeProperty

defined unit of system
inverse of: defined unit
sub property of: is unit of system
description: This property relates a unit of measure with the unit system that defines the unit.
type: ObjectProperty

Quantity
subclass of: QUDT Concept
dbpedia match: http://dbpedia.org/resource/Quantity
comment: A quantity is the measurement of an observable property of a particular object, event, or physical system. A quantity is always associated with the context of measurement (i.e. the thing measured, the measured value, the accuracy of measurement, etc.) whereas the underlying quantity kind is independent of any particular measurement. Thus, length is a quantity kind while the height of a rocket is a specific quantity of length; its magnitude that may be expressed in meters, feet, inches, etc. Examples of physical quantities include physical constants, such as the speed of light in a vacuum, Planck's constant, the electric permittivity of free space, and the fine structure constant. In other words, quantities are quantifiable aspects of the world, such as the duration of a movie, the distance between two points, velocity of a car, the pressure of the atmosphere, and a person's weight; and units are used to describe their numerical measure. Many quantity kinds are related to each other by various physical laws, and as a result, the associated units of some quantity kinds can be expressed as products (or ratios) of powers of other quantity kinds (e.g., momentum is mass times velocity and velocity is defined as distance divided by time). In this way, some quantities can be calculated from other measured quantities using their associations to the quantity kinds in these expressions. These quantity kind relationships are also discussed in dimensional analysis. Those that cannot be so expressed can be regarded as "fundamental" in this sense. A quantity is distinguished from a "quantity kind" in that the former carries a value and the latter is a type specifier.
subclass of: Restriction
  on property: has quantity kind
  all values from: Quantity Kind
subclass of: Restriction
  on property: quantity value
  all values from: Quantity value
  description: a reference to the dimension that quantifies the property
type: Class
subclass of: Quantifiable
subclass of: Restriction
  on property: has quantity kind
  min cardinality: 0
subclass of: Restriction
  on property: is Delta Quantity
  all values from: boolean

Logarithmic Unit
subclass of: Dimensionless Unit
comment: Logarithmic units are abstract mathematical units that can be used to express any quantities (physical or mathematical) that are defined on a logarithmic scale, that is, as being proportional to the value of a logarithm function. Examples of logarithmic units include common units of information and entropy, such as the bit, and the byte, as well as units of relative signal strength magnitude such as the decibel.
type: Class

QUDT Schema - Version 2.1.2
imports: core
imports: vaem
imports: dtype
imports: imports
has graph metadata: QUDT Schema - Version 2.1.2
type: Ontology

ucum code
sub property of: notation
range: Class
  union of: case-sensitive UCUM code
  union of: case-sensitive UCUM terminal
source: ucum.html
description: ucumCode associates a QUDT unit with its UCUM code (case-sensitive). In SHACL the values are derived from specifi ucum properties using 'sh:values'.
type: AnnotationProperty

rule type
type: ObjectProperty

exact constant
range: boolean
type: DatatypeProperty

Quantity Kind Dimension vector (SI)
subclass of: Quantity Kind Dimension Vector
type: Class

UTF-8 Encoding
bytes: 8
type: String Encoding Type

dimension exponent
range: numericUnion
type: DatatypeProperty

citation
range: string
description (plain text): Used to provide an annotation for an informative reference.
type: AnnotationProperty

byte order
range: Endian Type
description: Byte order is an enumeration of two values: 'Big Endian' and 'Little Endian' and is used to denote whether the most signiticant byte is either first or last, respectively.
type: ObjectProperty

encoding
type: ObjectProperty

defined unit
sub property of: has unit
description: This property relates a unit system with a unit of measure that is defined by the system.
type: ObjectProperty

Prefix
subclass of: Restriction
  on property: symbol
  min cardinality: 0
subclass of: Restriction
  on property: latex symbol
  min cardinality: 0
subclass of: Restriction
  on property: prefix multiplier
  max cardinality: 1
subclass of: Restriction
  on property: ucum code
  all values from: case-sensitive UCUM terminal
subclass of: Verifiable
subclass of: QUDT Concept
type: Class

has quantity kind dimension vector denominator part
type: ObjectProperty

Unit
subclass of: Restriction
  on property: numerator dimension vector
  all values from: Quantity Kind Dimension Vector
subclass of: Restriction
  on property: has dimension vector
  all values from: Quantity Kind Dimension Vector
subclass of: Restriction
  on property: conversion offset
  max cardinality: 1
subclass of: Restriction
  on property: latex symbol
  min cardinality: 0
subclass of: Restriction
  on property: has quantity kind
  max cardinality: 1
subclass of: Restriction
  on property: ucum code
  all values from: case-sensitive UCUM code
informative reference: http://www.allmeasures.com/Fullconversion.asp
subclass of: Restriction
  on property: abbreviation
  max cardinality: 1
subclass of: Restriction
  on property: si units expression
  min cardinality: 0
subclass of: Restriction
  on property: conversion multiplier
  max cardinality: 1
type: Class
subclass of: Restriction
  on property: has quantity kind
  all values from: Quantity Kind
subclass of: Restriction
  on property: numerator dimension vector
  max cardinality: 1
informative reference: http://dbpedia.org/resource/Category:Units_of_measure
subclass of: Restriction
  on property: denominator dimension vector
  all values from: Quantity Kind Dimension Vector
subclass of: Restriction
  on property: mathML definition
  max cardinality: 1
subclass of: Restriction
  on property: is unit of system
  all values from: System of Units
subclass of: Restriction
  on property: has dimension vector
  max cardinality: 1
subclass of: Restriction
  on property: latex definition
  min cardinality: 0
subclass of: Restriction
  on property: symbol
  min cardinality: 0
comment: A unit of measure, or unit, is a particular quantity value that has been chosen as a scale for measuring other quantities the same kind (more generally of equivalent dimension). For example, the meter is a quantity of length that has been rigorously defined and standardized by the BIPM (International Board of Weights and Measures). Any measurement of the length can be expressed as a number multiplied by the unit meter. More formally, the value of a physical quantity Q with respect to a unit (U) is expressed as the scalar multiple of a real number (n) and U, as \(Q = nU\).
subclass of: Restriction
  on property: expression
  min cardinality: 0
subclass of: Restriction
  on property: iec-61360 code
  all values from: string
subclass of: Restriction
  on property: denominator dimension vector
  max cardinality: 1
subclass of: Restriction
  on property: unece common code
  max cardinality: 1
subclass of: Verifiable
subclass of: QUDT Concept

Aspect Class
subclass of: Class
type: Class

has vocabulary
range: Ontology
description (plain text): Used to relate a class to one or more graphs where vocabularies for the class are defined.
type: AnnotationProperty

permissible maths
type: ObjectProperty

value for quantity
inverse of: quantity value
type: ObjectProperty

dimension exponent for luminous intensity
sub property of: dimension exponent
type: DatatypeProperty

Short Unsigned Integer Encoding
bytes: 2
type: Integer Encoding
type: Boolean encoding type

lower bound
type: DatatypeProperty

Unordered
description (plain text): Unordered structure.
literal: unordered
type: Ordered type

IEEE 754 1985 Real Encoding
bytes: 32
type: Floating Point Encoding

min exclusive
sub property of: lower bound
description: minExclusive is the exclusive lower bound of the value space for a datatype with the ordered property. The value of minExclusive must be in the value space of the base type or be equal to {value} in {base type definition}.
type: DatatypeProperty
type: Property

Verifiable
comment: An aspect class that holds properties that provide external knowledge and specifications of a given resource.
type: Aspect Class
subclass of: Restriction
  on property: normative reference (ISO)
  min cardinality: 0
subclass of: Restriction
  on property: normative reference (ISO)
  min cardinality: 0
subclass of: QUDT Aspect
subclass of: Restriction
  on property: informative reference
  min cardinality: 0
subclass of: Restriction
  on property: normative reference
  min cardinality: 0
subclass of: Restriction
  on property: normative reference
  min cardinality: 0
subclass of: Restriction
  on property: dbpedia match
  min cardinality: 0

is unit of system
inverse of: has unit
range: System of Units
domain: Unit
description: This property relates a unit of measure with a system of units that either a) defines the unit or b) allows the unit to be used within the system.
type: ObjectProperty

scale type
type: ObjectProperty

Date Time String Encoding Type
subclass of: Restriction
  on property: allowed pattern
  min cardinality: 1
subclass of: String Encoding Type
description: Date Time encodings are logical encodings for expressing date/time quantities as strings by applying unambiguous formatting and parsing rules.
type: Class

dimension exponent for mass
sub property of: dimension exponent
type: DatatypeProperty

applicable ISO unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

created
range: date
type: Property

base ISO unit dimensions
sub property of: base unit dimensions
range: Latex String
description: qudt:baseISOUnitDimensions is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units in the ISO System.
type: DatatypeProperty

default
description: The default element in an enumeration
type: ObjectProperty

Long Unsigned Integer Encoding
bytes: 8
type: Integer Encoding

Statement
subclass of: Statement
type: Class

Unsigned
literal: unsigned
type: Signedness type

ISO 8601 UTC Date Time - Basic Format
allowed pattern: [0-9]{4}[0-9]{2}[0-9]{2}T[0-9]{2}[0-9]{2}[0-9]{2}Z
allowed pattern: [0-9]{4}[0-9]{2}[0-9]{2}T[0-9]{2}[0-9]{2}[0-9]{2}.[0-9]+Z
type: Date Time String Encoding Type

has base quantity kind
inverse of: is base quantity kind of system
sub property of: has quantity kind
type: ObjectProperty
type: FunctionalProperty

informative reference
range: anyURI
description: Provides a way to reference a source that provided useful but non-normative information.
type: AnnotationProperty

latex definition
range: Latex String
type: AnnotationProperty

Quantity Kind
subclass of: Restriction
  on property: applicable Imperial unit
  min cardinality: 0
type: Class
comment: 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.
subclass of: Restriction
  on property: latex definition
  max cardinality: 1
subclass of: Restriction
  on property: base Imperial unit dimensions
  max cardinality: 1
subclass of: Restriction
  on property: dimension vector for SI
  all values from: Quantity Kind Dimension vector (SI)
informative reference: http://www.electropedia.org/iev/iev.nsf/display
subclass of: Restriction
  on property: generalization
  max cardinality: 1
subclass of: Restriction
  on property: numerator dimension vector
  on class: Quantity Kind Dimension Vector
  max qualified cardinality: 1
subclass of: Restriction
  on property: mathML definition
  max cardinality: 1
subclass of: Restriction
  on property: generalization
  all values from: Quantity Kind
subclass of: Restriction
  on property: has dimension vector
  all values from: Quantity Kind Dimension Vector
subclass of: Restriction
  on property: is quantity kind of
  all values from: System of Quantity Kinds
subclass of: Restriction
  on property: applicable ISO unit
  min cardinality: 0
subclass of: Restriction
  on property: applicable unit
  min cardinality: 0
subclass of: Restriction
  on property: base US Customary unit dimensions
  max cardinality: 1
subclass of: Restriction
  on property: base SI unit dimensions
  max cardinality: 1
subclass of: Restriction
  on property: base ISO unit dimensions
  max cardinality: 1
subclass of: Restriction
  on property: base CGS unit dimensions
  max cardinality: 1
subclass of: Quantity Kind (abstract)
subclass of: Restriction
  on property: base unit dimensions
  max cardinality: 4
subclass of: Restriction
  on property: applicable US Customary unit
  min cardinality: 0
subclass of: Restriction
  on property: dimension vector for SI
  max cardinality: 1
subclass of: Restriction
  on property: expression
  min cardinality: 0
subclass of: Restriction
  on property: denominator dimension vector
  on class: Quantity Kind Dimension Vector
  max qualified cardinality: 1
subclass of: Restriction
  on property: applicable SI unit
  min cardinality: 0
subclass of: Restriction
  on property: applicable CGS unit
  min cardinality: 0
subclass of: Verifiable

quantity
description: a property to relate an observable thing with a quantity (qud:Quantity)
type: ObjectProperty

OLE DB name
range: string
informative reference: http://msdn.microsoft.com/en-us/library/windows/desktop/ms714931(v=vs.85).aspx
informative reference: http://en.wikipedia.org/wiki/OLE_DB
description: OLE DB (Object Linking and Embedding, Database, sometimes written as OLEDB or OLE-DB), an API designed by Microsoft, allows accessing data from a variety of sources in a uniform manner. The API provides a set of interfaces implemented using the Component Object Model (COM); it is otherwise unrelated to OLE.
type: DatatypeProperty

literal
sub property of: literal
range: string
type: DatatypeProperty

dimension exponent for amount of substance
sub property of: dimension exponent
type: DatatypeProperty

reference
type: ObjectProperty

superseded by
type: ObjectProperty

contributor
range: string
type: Property

Rule Type
subclass of: Enumerated Value
type: Class

data structure
range: string
type: DatatypeProperty

Bit Encoding
subclass of: Encoding
description: A bit encoding is a correspondence between the two possible values of a bit, 0 or 1, and some interpretation. For example, in a boolean encoding, a bit denotes a truth value, where 0 corresponds to False and 1 corresponds to True.
type: Class

Interval scale
subclass of: Scale
comment: median, percentile & Monotonic increasing (order (<)) & totally ordered set
informative reference: https://en.wikipedia.org/wiki/Level_of_measurement
type: Class
comment: The interval type allows for the degree of difference between items, but not the ratio between them. Examples include temperature with the Celsius scale, which has two defined points (the freezing and boiling point of water at specific conditions) and then separated into 100 intervals, date when measured from an arbitrary epoch (such as AD), percentage such as a percentage return on a stock,[16] location in Cartesian coordinates, and direction measured in degrees from true or magnetic north. Ratios are not meaningful since 20 °C cannot be said to be "twice as hot" as 10 °C, nor can multiplication/division be carried out between any two dates directly. However, ratios of differences can be expressed; for example, one difference can be twice another. Interval type variables are sometimes also called "scaled variables", but the formal mathematical term is an affine space (in this case an affine line). Characteristics: median, percentile & Monotonic increasing (order (<) & totally ordered set

exact match
range: Unit
type: ObjectProperty

Counting Unit
subclass of: ResourceUnit
subclass of: Dimensionless Unit
comment: Used for all units that express counts. Examples are Atomic Number, Number, Number per Year, Percent and Sample per Second.
type: Class

negative delta limit
range: string
description: A negative change limit between consecutive sample values for a parameter. The Negative Delta may be the encoded value or engineering units value depending on whether or not a Calibrator is defined.
type: DatatypeProperty

modified
range: date
type: Property

protocol buffers name
range: string
type: Property

derived quantity kind of system
inverse of: system derived quantity kind
sub property of: is quantity kind of
type: ObjectProperty

is scaling of
type: TransitiveProperty
type: ObjectProperty

has quantity
range: Quantity
type: ObjectProperty

dbpedia match
range: anyURI
type: AnnotationProperty

currency exponent
range: integer
description: The currency exponent indicates the number of decimal places between a major currency unit and its minor currency unit. For example, the US dollar is the major currency unit of the United States, and the US cent is the minor currency unit. Since one cent is 1/100 of a dollar, the US dollar has a currency exponent of 2. However, the Japanese Yen has no minor currency units, so the yen has a currency exponent of 0.
type: FunctionalProperty
type: DatatypeProperty

Short Signed Integer Encoding
bytes: 2
type: Integer Encoding

NIST SP~811 Comment
subclass of: Comment
description: National Institute of Standards and Technology (NIST) Special Publication 811 Comments on some quantities and their units
type: Class

belongs to system of quantities
range: System of Quantity Kinds
domain: Quantity Kind
type: ObjectProperty

System of Quantity Kinds
type: Class
subclass of: Restriction
  on property: has quantity kind
  min cardinality: 0
subclass of: QUDT Concept
subclass of: Restriction
  on property: base dimension enumeration
  all values from: Enumeration
subclass of: Restriction
  on property: has quantity kind
  all values from: Quantity Kind
subclass of: Restriction
  on property: has unit system
  all values from: System of Units
subclass of: Restriction
  on property: base dimension enumeration
  max cardinality: 1
comment: A system of quantity kinds is a set of one or more quantity kinds together with a set of zero or more algebraic equations that define relationships between quantity kinds in the set. In the physical sciences, the equations relating quantity kinds are typically physical laws and definitional relations, and constants of proportionality. Examples include Newton’s First Law of Motion, Coulomb’s Law, and the definition of velocity as the instantaneous change in position. In almost all cases, the system identifies a subset of base quantity kinds. The base set is chosen so that all other quantity kinds of interest can be derived from the base quantity kinds and the algebraic equations. If the unit system is explicitly associated with a quantity kind system, then the unit system must define at least one unit for each quantity kind. From a scientific point of view, the division of quantities into base quantities and derived quantities is a matter of convention.

Unsigned Integer Encoding
bytes: 4
type: Integer Encoding

system derived quantity kind
inverse of: derived quantity kind of system
sub property of: has quantity kind
type: ObjectProperty

has unit
inverse of: is unit of system
description: This property relates a system of units with a unit of measure that is either a) defined by the system, or b) accepted for use by the system and is convertible to a unit of equivalent dimension that is defined by the system. Systems of units may distinguish between base and derived units. Base units are the units which measure the base quantities for the corresponding system of quantities. The base units are used to define units for all other quantities as products of powers of the base units. Such units are called derived units for the system.
type: ObjectProperty

applicable unit
range: Unit
type: ObjectProperty

Data Encoding
comment: Data Encoding expresses the properties that specify how data is represented at the bit and byte level. These properties are applicable to describing raw data.
subclass of: Restriction
  on property: bit order
  max cardinality: 1
subclass of: Restriction
  on property: encoding
  max cardinality: 1
subclass of: Restriction
  on property: bit order
  all values from: Endian Type
subclass of: QUDT Aspect
type: Class
subclass of: Restriction
  on property: byte order
  max cardinality: 1
subclass of: Restriction
  on property: encoding
  all values from: Encoding

conversion coefficient
range: double
type: DatatypeProperty

ODBC name
range: string
type: DatatypeProperty

denominator dimension vector
range: Quantity Kind Dimension Vector
type: ObjectProperty

CGS LH Dimension vector
subclass of: CGS Dimension vector
comment: A CGS LH Dimension Vector is used to specify the dimensions for Lorentz-Heaviside C.G.S. quantity kind.
type: Class

base SI unit dimensions
sub property of: base unit dimensions
range: string
description: qudt:baseSIUnitDimensions is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units. For example, in the SI system \(capacitance\) has the unit \(Farad\) and base unit dimensions of \(C^2 \cdot s^2 / (kg \cdot m^2)\).
type: DatatypeProperty

Floating Point Encoding
subclass of: Encoding
description: A "Encoding" with the following instance(s): "Double Precision Encoding", "Single Precision Real Encoding".
type: Class

datatype
type: ObjectProperty

dtype
namespace prefix: dtype
namespace: http://www.linkedmodel.org/schema/dtype#

unece common code
range: string
type: DatatypeProperty

Quantity type
subclass of: Restriction
  on property: value
  all values from: Quantity Kind
subclass of: Enumerated Value
description: \(\textit{Quantity Type}\) is an enumeration of quanity kinds. It specializes \(\boxed{dtype:EnumeratedValue}\) by constrinaing \(\boxed{dtype:value}\) to instances of \(\boxed{qudt:QuantityKind}\).
type: Class

Signedness type
one of: Signed
one of: Unsigned
subclass of: Enumerated Value
description: Specifics whether a value should be signed or unsigned.
type: Class

source
range: anyURI
type: AnnotationProperty

Quantity Kind (abstract)
subclass of: Restriction
  on property: symbol
  min cardinality: 0
subclass of: Restriction
  on property: latex symbol
  min cardinality: 0
subclass of: Restriction
  on property: broader
  all values from: Quantity Kind
subclass of: QUDT Concept
type: Class

Physical Constant
subclass of: Restriction
  on property: mathML definition
  max cardinality: 1
subclass of: Restriction
  on property: latex symbol
  max cardinality: 1
subclass of: Restriction
  on property: latex definition
  max cardinality: 1
subclass of: Quantity
comment: A physical constant is a physical quantity that is generally believed to be both universal in nature and constant in time. It can be contrasted with a mathematical constant, which is a fixed numerical value but does not directly involve any physical measurement. There are many physical constants in science, some of the most widely recognized being the speed of light in vacuum c, Newton's gravitational constant G, Planck's constant h, the electric permittivity of free space ε0, and the elementary charge e. Physical constants can take many dimensional forms, or may be dimensionless depending on the system of quantities and units used.
dbpedia match: http://dbpedia.org/resource/Physical_constant
type: Class

Endian Type
one of: LittleEndian
one of: BigEndian
subclass of: Enumerated Value
description (plain text): In computing, endianness is the ordering used to represent some kind of data as a sequence of smaller units. Typical cases are the order in which integer values are stored as bytes in computer memory (relative to a given memory addressing scheme) and the transmission order over a network or other medium. When specifically talking about bytes, endianness is also referred to simply as byte order. Most computer processors simply store integers as sequences of bytes, so that, conceptually, the encoded value can be obtained by simple concatenation. For an 'n-byte' integer value this allows 'n!' (n factorial) possible representations (one for each byte permutation). The two most common of them are: increasing numeric significance with increasing memory addresses, known as little-endian, and its opposite, called big-endian.
informative reference: http://en.wikipedia.org/wiki/Endianness
type: Class

si units expression
range: string
type: DatatypeProperty

bytes
range: integer
type: DatatypeProperty
type: Property

applicable Imperial unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

unit
inverse of: unit for
range: Unit
description: A reference to the unit of measure of a quantity (variable or constant) of interest.
type: ObjectProperty

Latex String
subclass of: string
comment: A type of string in which some characters may be wrapped with '\(' and '\) characters for LaTeX rendering.
type: Datatype

Quantifiable
subclass of: Restriction
  on property: value
  all values from: value union
comment: Quantifiable ascribes to some thing the capability of being measured, observed, or counted.
subclass of: Restriction
  on property: standard uncertainty
  all values from: double
subclass of: Restriction
  on property: relative standard uncertainty
  all values from: double
subclass of: Restriction
  on property: unit
  all values from: Unit
subclass of: Restriction
  on property: standard uncertainty
  max cardinality: 1
subclass of: Restriction
  on property: value
  max cardinality: 1
subclass of: Restriction
  on property: data encoding
  all values from: Data Encoding
subclass of: Restriction
  on property: relative standard uncertainty
  max cardinality: 1
subclass of: Restriction
  on property: datatype
  max cardinality: 1
subclass of: Restriction
  on property: unit
  max cardinality: 1
subclass of: Restriction
  on property: data encoding
  max cardinality: 1
subclass of: Restriction
  on property: datatype
  all values from: QUDT Datatype
type: Class
subclass of: QUDT Aspect

applicable Planck unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

allowed pattern
type: Property

has reference quantity kind
type: ObjectProperty

is quantity kind of
inverse of: has quantity kind
type: ObjectProperty

is dimension in system
type: ObjectProperty

acronym
range: string
type: DatatypeProperty

Scalar Datatype
type: Class
subclass of: Restriction
  on property: max inclusive
  max cardinality: 1
subclass of: Restriction
  on property: min exclusive
  max cardinality: 1
subclass of: Restriction
  on property: min inclusive
  max cardinality: 1
subclass of: Restriction
  on property: bytes
  max cardinality: 1
subclass of: Restriction
  on property: rdfs datatype
  all values from: Datatype
subclass of: Restriction
  on property: length
  max cardinality: 1
description: Scalar data types are those that have a single value. The permissible values are defined over a domain that may be integers, float, character or boolean. Often a scalar data type is referred to as a primitive data type.
subclass of: Restriction
  on property: rdfs datatype
  max cardinality: 1
subclass of: Restriction
  on property: max exclusive
  max cardinality: 1
subclass of: QUDT Datatype
subclass of: Restriction
  on property: bits
  max cardinality: 1

min inclusive
sub property of: lower bound
description: minInclusive is the inclusive lower bound of the value space for a datatype with the ordered property. The value of minInclusive must be in the value space of the base type.
type: DatatypeProperty

User Quantity Kind
subclass of: Restriction
  on property: has quantity kind
  cardinality: 1
subclass of: Restriction
  on property: has quantity kind
  all values from: Quantity Kind
subclass of: Quantity Kind (abstract)
type: Class

width
range: string
type: DatatypeProperty

conversion offset
range: double
type: FunctionalProperty
type: DatatypeProperty

Dimensionless Unit
subclass of: Unit
comment: A Dimensionless Unit is a quantity for which all the exponents of the factors corresponding to the base quantities in its quantity dimension are zero.
type: Class

prefix multiplier
range: double
type: FunctionalProperty
type: DatatypeProperty

figure label
range: string
type: DatatypeProperty

ORACLE SQL name
range: string
type: Property

reference unit
type: ObjectProperty
type: FunctionalProperty

Partially Ordered
description (plain text): Partial ordered structure.
literal: partial
type: Ordered type

Javascript name
range: string
type: DatatypeProperty

dimension exponent for time
sub property of: dimension exponent
type: DatatypeProperty

permissible transformation
type: ObjectProperty

has quantity kind
inverse of: is quantity kind of
range: Quantity Kind
type: ObjectProperty

Discipline
subclass of: QUDT Concept
type: Class

QUDT Schema Catalog Entry
type: CatalogEntry

Signed
literal: signed
type: Signedness type

categorized as
type: ObjectProperty

applicable physical constant
type: ObjectProperty

Scale
subclass of: Restriction
  on property: scale type
  max cardinality: 1
subclass of: Restriction
  on property: scale type
  all values from: Scale type
subclass of: QUDT Concept
type: Class
subclass of: Restriction
  on property: data structure
  max cardinality: 1
subclass of: Restriction
  on property: permissible maths
  all values from: MathsFunctionType
subclass of: Restriction
  on property: permissible transformation
  all values from: TransformType
comment: Scales (also called "scales of measurement" or "levels of measurement") are expressions that typically refer to the theory of scale types.

online reference
range: anyURI
type: AnnotationProperty

title
range: string
type: AnnotationProperty

image
range: anyURI
type: DatatypeProperty

bits
range: integer
type: Property

height
range: string
type: DatatypeProperty

iec-61360 code
range: string
type: DatatypeProperty

Countably Infinite Cardinality Type
literal: countable
informative reference: http://www.math.vanderbilt.edu/~schectex/courses/infinity.pdf
description: A set of numbers is called countably infinite if there is a way to enumerate them. Formally this is done with a bijection function that associates each number in the set with exactly one of the positive integers. The set of all fractions is also countably infinite. In other words, any set \(X\) that has the same cardinality as the set of the natural numbers, or \(| X | \; = \; | \mathbb N | \; = \; \aleph0\), is said to be a countably infinite set.
type: Cardinality Type

is coherent derived unit of system
inverse of: derived coherent unit
sub property of: is derived unit of system
sub property of: is coherent unit of system
description: This property relates a unit of measure to the unit system in which the unit is derived from the system's base units with a proportionality constant of one.
type: ObjectProperty

CGS Dimension vector
subclass of: Quantity Kind Dimension Vector
comment: A CGS Dimension Vector is used to specify the dimensions for a C.G.S. quantity kind.
type: Class

base unit
inverse of: is base unit of system
sub property of: coherent unit
description: This property relates a system of units to a base unit defined within the system. The base units of a system are used to define the derived units of the system by expressing the derived units as products of the base units raised to a rational power.
type: ObjectProperty

relative standard uncertainty
range: double
description: The relative standard uncertainty of a measurement is the (absolute) standard uncertainty divided by the magnitude of the exact value.
type: DatatypeProperty

numerator dimension vector
range: Quantity Kind Dimension Vector
type: ObjectProperty

Math Function Type
subclass of: QUDT Concept
type: Class

QUDT Schema - Version 2.1.2
has owner: QUDT
contributor: James E. Masters
uses non imported resource: rights
is metadata for: QUDT Schema - Version 2.1.2
description: The QUDT, or "Quantity, Unit, Dimension and Type" schema defines the base classes properties, and restrictions used for modeling physical quantities, units of measure, and their dimensions in various measurement systems. The goal of the QUDT ontology is to provide a unified model of, measurable quantities, units for measuring different kinds of quantities, the numerical values of quantities in different units of measure and the data structures and data types used to store and manipulate these objects in software. Except for unit prefixes, all units are specified in separate vocabularies. Descriptions are provided in both HTML and LaTeX formats. A quantity is a measure of an observable phenomenon, that, when associated with something, becomes a property of that thing; a particular object, event, or physical system. A quantity has meaning in the context of a measurement (i.e. the thing measured, the measured value, the accuracy of measurement, etc.) whereas the underlying quantity kind is independent of any particular measurement. Thus, length is a quantity kind while the height of a rocket is a specific quantity of length; its magnitude that may be expressed in meters, feet, inches, etc. Or, as stated at Wikipedia, in the language of measurement, quantities are quantifiable aspects of the world, such as time, distance, velocity, mass, momentum, energy, and weight, and units are used to describe their measure. Many of these quantities are related to each other by various physical laws, and as a result the units of some of the quantities can be expressed as products (or ratios) of powers of other units (e.g., momentum is mass times velocity and velocity is measured in distance divided by time).
has steward: QUDT
graph name: qudt
previous published version: http://www.qudt.org/doc/2020/08/DOC_SCHEMA-QUDT-v2.1.html
contributor: Daniel Mekonnen
with attribution to: QUDT-Attribution
informative reference: http://www.bipm.org/en/publications/si-brochure
type: GraphMetaData
uses non imported resource: contributor
uses non imported resource: modified
contributor: Steve Ray
version IRI: QUDT Schema - Version 2.1.2
contributor: Jack Hodges
uses non imported resource: subject
owner: qudt.org
modified: 2020-10-09T09:18:04.592-07:00
graph title: Quantities, Units, Dimensions and Types (QUDT) Schema - Version 2.1.2
subject: QUDT
uses non imported resource: abstract
rights: The QUDT Ontologies are issued under a Creative Commons Attribution 4.0 International License (CC BY 4.0), available at https://creativecommons.org/licenses/by/4.0/. Attribution should be made to QUDT.org
revision: 2.1
intent: Specifies the schema for quantities, units and dimensions. Types are defined in other schemas.
namespace prefix: qudt
informative reference: https://books.google.com/books
contributor: David Price
uses non imported resource: description
uses non imported resource: created
rights: This product includes all or a portion of the UCUM table, UCUM codes, and UCUM definitions or is derived from it, subject to a license from Regenstrief Institute, Inc. and The UCUM Organization. Your use of the UCUM table, UCUM codes, UCUM definitions also is subject to this license, a copy of which is available at ​http://unitsofmeasure.org. The current complete UCUM table, UCUM Specification are available for download at ​http://unitsofmeasure.org. The UCUM table and UCUM codes are copyright © 1995-2009, Regenstrief Institute, Inc. and the Unified Codes for Units of Measures (UCUM) Organization. All rights reserved. THE UCUM TABLE (IN ALL FORMATS), UCUM DEFINITIONS, AND SPECIFICATION ARE PROVIDED 'AS IS.' ANY EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
informative reference: http://www.bipm.org/utils/common/documents/jcgm/JCGM_200_2008.pdf
creator: Ralph Hodgson
uses non imported resource: source
created: 2011-04-20
uses non imported resource: QUDT-Attribution
informative reference: http://unitsofmeasure.org/trac
contributor: Simon J D Cox
informative reference: https://www.nist.gov/physical-measurement-laboratory/special-publication-811
turtle file URL: QUDT Schema - Version 2.1.2
uses non imported resource: title
latest published version: http://www.qudt.org/doc/2020/10/DOC_SCHEMA-QUDT-v2.1.html
has graph role: SchemaGraph
namespace: http://qudt.org/schema/qudt/

Scale type
subclass of: Restriction
  on property: data structure
  max cardinality: 1
subclass of: Restriction
  on property: permissible transformation
  all values from: TransformType
subclass of: Restriction
  on property: permissible maths
  all values from: MathsFunctionType
subclass of: Enumerated Value
description (plain text): Scales, or scales of measurement (or categorization) provide ways of quantifying measurements, values and other enumerated values according to a normative frame of reference. Four different types of scales are typically used. These are interval, nominal, ordinal and ratio scales.
type: Class

CGS EMU Dimension vector
subclass of: CGS Dimension vector
comment: A CGS EMU Dimension Vector is used to specify the dimensions for EMU C.G.S. quantity kind.
type: Class

element type
type: Property

value
description: A property to relate an observable thing with a value that can be of any simple XSD type
type: ObjectProperty

rdfs datatype
type: Property

Wikipedia
type: Organization

Rule
subclass of: Restriction
  on property: rationale
  min cardinality: 0
subclass of: Restriction
  on property: example
  min cardinality: 0
subclass of: Restriction
  on property: rule type
  all values from: Rule Type
subclass of: Verifiable
subclass of: QUDT Concept
type: Class

Cardinality Type
one of: Countably Infinite Cardinality Type
one of: Finite Cardinality Type
subclass of: Enumerated Value
description (plain text): In mathematics, the cardinality of a set is a measure of the number of elements of the set. For example, the set 'A = {2, 4, 6}' contains 3 elements, and therefore 'A' has a cardinality of 3. There are two approaches to cardinality – one which compares sets directly using bijections and injections, and another which uses cardinal numbers.
informative reference: http://en.wikipedia.org/wiki/Cardinality
informative reference: http://en.wikipedia.org/wiki/Cardinal_number
description: In mathematics, the cardinality of a set is a measure of the number of elements of the set. For example, the set \(A = {2, 4, 6}\) contains 3 elements, and therefore \(A\) has a cardinality of 3. There are two approaches to cardinality – one which compares sets directly using bijections and injections, and another which uses cardinal numbers.
type: Class

out of scope
range: boolean
type: AnnotationProperty

is Delta Quantity
range: boolean
comment: This property is used to identify a Quantity instance that is a measure of a change, or interval, of some property, rather than a measure of its absolute value. This is important for measurements such as temperature differences where the conversion among units would be calculated differently because of offsets.
type: DatatypeProperty

has non-coherent unit
inverse of: is coherent unit of system
sub property of: defined unit
description: A coherent unit of measurement for a unit system is a defined unit that may be expressed as a product of powers of the system's base units with the proportionality factor of one.
type: ObjectProperty
type: DeprecatedProperty

Citation
subclass of: Restriction
  on property: url
  max cardinality: 1
subclass of: Restriction
  on property: qudt description
  cardinality: 1
subclass of: QUDT Concept
comment: Provides a simple way of making citations.
type: Class

applicable CGS unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

ordered type
type: Property

Finite Cardinality Type
literal: finite
description: Any set \(X\) with cardinality less than that of the natural numbers, or \(| X | \\; < \; | \\mathbb N | \), is said to be a finite set.
type: Cardinality Type

landscape
range: boolean
type: DatatypeProperty

OCTET Encoding
bytes: 1
type: Byte Encoding
type: Boolean encoding type

Base Dimension Magnitude
comment: A Dimension expresses a magnitude for a base quantiy kind such as mass, length and time. DEPRECATED - each exponent is expressed as a property. Keep until a validaiton of this has been done.
subclass of: QUDT Concept
informative reference: http://en.wikipedia.org/wiki/Dimensional_analysis
subclass of: Restriction
  on property: vector magnitude
  cardinality: 1
subclass of: Restriction
  on property: vector magnitude
  all values from: float
informative reference: http://web.mit.edu/2.25/www/pdf/DA_unified.pdf
type: Class
subclass of: Restriction
  on property: has base quantity kind
  cardinality: 1
subclass of: Restriction
  on property: has base quantity kind
  all values from: Quantity Kind

allowed unit
sub property of: has unit
description: This property relates a unit system with a unit of measure that is not defined by or part of the system, but is allowed for use within the system. An allowed unit must be convertible to some dimensionally eqiuvalent unit that is defined by the system.
type: ObjectProperty

dimension expression
type: ObjectProperty

CGS GAUSS Dimension vector
subclass of: CGS Dimension vector
comment: A CGS GAUSS Dimension Vector is used to specify the dimensions for Gaussioan C.G.S. quantity kind.
type: Class

Decimal Prefix
subclass of: Prefix
comment: A Decimal Prefix is a prefix for multiples of units that are powers of 10.
type: Class

ANSI SQL Name
range: string
type: Property

image location
range: anyURI
type: DatatypeProperty

system definition
type: TransitiveProperty
type: ObjectProperty

QUDT Aspect
subclass of: Thing
comment: An aspect is an abstract type class that defines properties that can be reused.
type: Aspect Class

Ratio scale
subclass of: Scale
comment: The ratio type takes its name from the fact that measurement is the estimation of the ratio between a magnitude of a continuous quantity and a unit magnitude of the same kind (Michell, 1997, 1999). A ratio scale possesses a meaningful (unique and non-arbitrary) zero value. Most measurement in the physical sciences and engineering is done on ratio scales. Examples include mass, length, duration, plane angle, energy and electric charge. In contrast to interval scales, ratios are now meaningful because having a non-arbitrary zero point makes it meaningful to say, for example, that one object has "twice the length" of another (= is "twice as long"). Very informally, many ratio scales can be described as specifying "how much" of something (i.e. an amount or magnitude) or "how many" (a count). The Kelvin temperature scale is a ratio scale because it has a unique, non-arbitrary zero point called absolute zero.
informative reference: https://en.wikipedia.org/wiki/Level_of_measurement
type: Class

base Imperial unit dimensions
sub property of: base unit dimensions
range: string
description: qudt:baseImperialUnitDimensions is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units in the Imperial System.
type: DatatypeProperty

case-sensitive UCUM terminal
with restrictions:
  pattern: [\x21,\x23-\x27,\x2a,\x2c,\x30-\x3c,\x3e-\x5a,\x5c,\x5e-\x7a,\x7c,\x7e]+
on datatype: string
subclass of: Resource
comment: Lexical pattern for the terminal symbols in the case-sensitive version of UCUM code
source: ucum.html
type: Datatype

dimension exponent for length
sub property of: dimension exponent
type: DatatypeProperty

latex symbol
sub property of: literal
range: string
description: The symbol is a glyph that is used to represent some concept, typically a unit or a quantity, in a compact form. For example, the symbol for an Ohm is \(ohm\). This contrasts with 'unit:abbreviation', which gives a short alphanumeric abbreviation for the unit, 'ohm' for Ohm.
type: DatatypeProperty

vector magnitude
range: float
type: FunctionalProperty
type: DatatypeProperty

QUDT Concept
subclass of: Restriction
  on property: has rule
  all values from: Rule
type: Class
subclass of: Restriction
  on property: qudt description
  max cardinality: 1
subclass of: Restriction
  on property: description
  max cardinality: 1
comment: The root class for all QUDT concepts.
subclass of: Restriction
  on property: abbreviation
  max cardinality: 1
subclass of: Restriction
  on property: description (plain text)
  max cardinality: 1
subclass of: Thing
subclass of: Restriction
  on property: qudt id
  max cardinality: 1

dimension vector for SI
range: Quantity Kind Dimension vector (SI)
type: ObjectProperty

Imperial dimension vector
subclass of: Quantity Kind Dimension Vector
type: Class

max exclusive
sub property of: upper bound
range: string
description: maxExclusive is the exclusive upper bound of the value space for a datatype with the ordered property. The value of maxExclusive must be in the value space of the base type or be equal to {value} in {base type definition}.
type: DatatypeProperty

was derived from
range: QUDT Concept
type: Property

max inclusive
sub property of: upper bound
description: maxInclusive is the inclusive upper bound of the value space for a datatype with the ordered property. The value of maxInclusive must be in the value space of the base type.
type: DatatypeProperty

Enumeration scale
subclass of: Enumeration
subclass of: Scale
type: Class

url
range: anyURI
type: DatatypeProperty

Organization
subclass of: Restriction
  on property: url
  min cardinality: 0
subclass of: QUDT Concept
type: Class

float percentage
equivalent class: Datatype
  with restrictions:
    min inclusive: 0.00
  with restrictions:
    max inclusive: 100.00
  on datatype: float
subclass of: float
type: Datatype

QUDT
website: http:/www.qudt.org
graph name: qudt.org
description: QUDT is a non-profit organization that governs the QUDT ontologies.
type: Party

derived unit
inverse of: is derived unit of system
description: This property relates a system of units to a unit of measure that is defined within the system in terms of the base units for the system. That is, the derived unit is defined as a product of the base units for the system raised to some rational power.
type: ObjectProperty

value union
equivalent class: Class
  union of: anySimpleType
  union of: EnumeratedValue
subclass of: Resource
description: A datatype that is the union of numeric xsd data types. "numericUnion" is equivalent to the xsd specification that uses an xsd:union of memberTypes="xsd:decimal xsd:double xsd:float xsd:integer".
type: Datatype

Boolean Encoding
type: Boolean encoding type

Comment
subclass of: Restriction
  on property: rationale
  min cardinality: 0
subclass of: Restriction
  on property: qudt description
  max cardinality: 1
subclass of: Restriction
  on property: description
  max cardinality: 1
subclass of: Thing
subclass of: Verifiable
type: Class

qudt id
range: string
domain: QUDT Concept
description: The "qudt:id" is an identifier string that uniquely identifies a QUDT concept. The identifier is constructed using a prefix. For example, units are coded using the pattern: "UCCCENNNN", where "CCC" is a numeric code or a category and "NNNN" is a digit string for a member element of that category. For scaled units there may be an addition field that has the format "QNN" where "NN" is a digit string representing an exponent power, and "Q" is a qualifier that indicates with the code "P" that the power is a positive decimal exponent, or the code "N" for a negative decimal exponent, or the code "B" for binary positive exponents.
type: DatatypeProperty

coherent unit
inverse of: is coherent unit of system
sub property of: defined unit
description: A coherent unit of measurement for a unit system is a defined unit that may be expressed as a product of powers of the system's base units with the proportionality factor of one.
type: ObjectProperty

Big Endian
literal: big
type: Endian Type

has rule
type: ObjectProperty

derived coherent unit
inverse of: is coherent derived unit of system
sub property of: derived unit
sub property of: coherent unit
type: ObjectProperty

conversion multiplier
range: double
type: FunctionalProperty
type: DatatypeProperty

figure caption
range: string
type: DatatypeProperty

unit for
inverse of: unit
type: ObjectProperty

Symbol
subclass of: QUDT Concept
type: Class

Totally Ordered
description (plain text): Totally ordered structure.
literal: total
type: Ordered type

mathML definition
sub property of: math definition
range: string
type: AnnotationProperty

denominator dimension vector
range: Quantity Kind Dimension Vector
type: ObjectProperty

basis
type: Property

Relevant Unit
range: Unit
comment: This property is used for qudt:Discipline instances to identify the Unit instances that are used within a given discipline.
type: ObjectProperty

Constant value
subclass of: Restriction
  on property: exact constant
  max cardinality: 1
subclass of: Quantity value
comment: Used to specify the values of a constant.
type: Class

base US Customary unit dimensions
sub property of: base unit dimensions
range: string
description: "qudt:baseUSCustomaryUnitDimensions" is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units in the US Customary System.
type: DatatypeProperty

expression
description: An 'expression' is a finite combination of symbols that are well-formed according to rules that apply to units of measure, quantity kinds and their dimensions.
type: AnnotationProperty

subject
range: string
type: AnnotationProperty

case-insensitive UCUM code
with restrictions:
  pattern: [\x21-\x60,\x7b-\x7e]+
on datatype: string
deprecated: true
subclass of: Resource
comment: Lexical pattern for the case-insensitive version of UCUM code
type: Datatype

integer percentage
equivalent class: Datatype
  with restrictions:
    min inclusive: 0
  with restrictions:
    max inclusive: 100
  on datatype: integer
subclass of: integer
type: Datatype

Currency Unit
subclass of: Dimensionless Unit
comment: Used for all units that express currency.
comment: Currency Units have their own subclass of unit because: (a) they have additonal properites such as 'country' and (b) their URIs do not conform to the same rules as other units.
type: Class

element
description: An element of an enumeration
type: ObjectProperty

base dimension enumeration
range: Enumeration
description: This property associates a system of quantities with an enumeration that enumerates the base dimensions of the system in canonical order.
type: ObjectProperty
type: FunctionalProperty

is derived unit of system
inverse of: derived unit
sub property of: is unit of system
description: This property relates a unit of measure to the system of units in which it is defined as a derived unit. That is, the derived unit is defined as a product of the base units for the system raised to some rational power.
type: ObjectProperty

java name
range: string
type: DatatypeProperty

Boolean encoding type
subclass of: Encoding
type: Class

om unit
domain: Unit
type: ObjectProperty

python name
range: string
type: Property

is base unit of system
inverse of: base unit
sub property of: is coherent unit of system
description: This property relates a unit of measure to the system of units in which it is defined as a base unit for the system. The base units of a system are used to define the derived units of the system by expressing the derived units as products of the base units raised to a rational power.
type: ObjectProperty

Quantity value
subclass of: Restriction
  on property: unit
  cardinality: 1
subclass of: Quantifiable
subclass of: QUDT Concept
comment: A Quantity Value expresses the magnitude and kind of a quantity and is given by the product of a numerical value n and a unit of measure U. The number multiplying the unit is referred to as the numerical value of the quantity expressed in that unit. Refer to NIST SP 811 section 7 for more on quantity values.
type: Class

figure
range: Figure
description: Provides a link to an image.
type: AnnotationProperty

ucum case-insensitive code
deprecated: true
sub property of: ucum code
description: ucumCode associates a QUDT unit with a UCUM case-insensitive code.
type: AnnotationProperty

dimension exponent for electric current
sub property of: dimension exponent
range: integer
type: DatatypeProperty

Binary Prefix
subclass of: Prefix
comment: A Binary Prefix is a prefix for multiples of units in data processing, data transmission, and digital information, notably the bit and the byte, to indicate multiplication by a power of 2.
type: Class

system dimension
type: ObjectProperty

dimension inverse
type: SymmetricProperty
type: ObjectProperty
type: InverseFunctionalProperty
type: FunctionalProperty

cardinality
type: Property

System of Units
comment: A system of units is a set of units which are chosen as the reference scales for some set of quantity kinds together with the definitions of each unit. Units may be defined by experimental observation or by proportion to another unit not included in the system. If the unit system is explicitly associated with a quantity kind system, then the unit system must define at least one unit for each quantity kind.
subclass of: Restriction
  on property: allowed unit
  all values from: Unit
informative reference: http://dbpedia.org/resource/Category:Systems_of_units
subclass of: Restriction
  on property: derived coherent unit
  all values from: Unit
subclass of: Restriction
  on property: defined unit
  all values from: Unit
subclass of: Restriction
  on property: applicable physical constant
  all values from: Physical Constant
subclass of: Restriction
  on property: coherent unit
  all values from: Unit
informative reference: http://www.ieeeghn.org/wiki/index.php/System_of_Measurement_Units
subclass of: Restriction
  on property: base unit
  all values from: Unit
type: Class
subclass of: Restriction
  on property: derived unit
  all values from: Unit
subclass of: QUDT Concept
subclass of: Restriction
  on property: has unit
  all values from: Unit

Microsoft SQL Server name
range: string
type: DatatypeProperty

case-sensitive UCUM code
with restrictions:
  pattern: [\x21-\x7e]+
on datatype: string
subclass of: Resource
comment: Lexical pattern for the case-sensitive version of UCUM code
source: ucum.html
type: Datatype

coherent unit system
sub property of: has unit system
informative reference: https://en.wikipedia.org/wiki/Coherence_(units_of_measurement)
description: A system of units is coherent with respect to a system of quantities and equations if the system of units is chosen in such a way that the equations between numerical values have exactly the same form (including the numerical factors) as the corresponding equations between the quantities. In such a coherent system, no numerical factor other than the number 1 ever occurs in the expressions for the derived units in terms of the base units. For example, the \(newton\) and the \(joule\). These two are, respectively, the force that causes one kilogram to be accelerated at 1 metre per (1) second per (1) second, and the work done by 1 newton acting over 1 metre. Being coherent refers to this consistent use of 1. In the old c.g.s. system , with its base units the centimetre and the gram, the corresponding coherent units were the dyne and the erg, respectively the force that causes 1 gram to be accelerated at 1 centimetre per (1) second per (1) second, and the work done by 1 dyne acting over 1 centimetre. So \(1\,newton = 10^5 dyne\), \(1 joule = 10^7 erg\), making each of the four compatible in a decimal sense within its respective other system, but not coherent therein.
type: ObjectProperty
type: FunctionalProperty

description (plain text)
range: string
description: A plain text description is used to provide a description with only simple ASCII characters for cases where LaTeX , HTML or other markup would not be appropriate.
type: AnnotationProperty

matlab name
range: string
type: DatatypeProperty

Ordinal scale
subclass of: Scale
subclass of: Restriction
  on property: order
  cardinality: 1
informative reference: https://en.wikipedia.org/wiki/Level_of_measurement
type: Class
comment: The ordinal type allows for rank order (1st, 2nd, 3rd, etc.) by which data can be sorted, but still does not allow for relative degree of difference between them. Examples include, on one hand, dichotomous data with dichotomous (or dichotomized) values such as 'sick' vs. 'healthy' when measuring health, 'guilty' vs. 'innocent' when making judgments in courts, 'wrong/false' vs. 'right/true' when measuring truth value, and, on the other hand, non-dichotomous data consisting of a spectrum of values, such as 'completely agree', 'mostly agree', 'mostly disagree', 'completely disagree' when measuring opinion.

description
type: AnnotationProperty
type: Property

Byte Encoding
subclass of: Encoding
description: This class contains the various ways that information may be encoded into bytes.
type: Class

Derived Unit
subclass of: Unit
comment: A DerivedUnit is a type specification for units that are derived from other units.
dbpedia match: http://dbpedia.org/resource/Category:SI_derived_units
type: DeprecatedClass
type: Class

prefix
range: Prefix
comment: Associates a unit with the appropriate prefix, if any.
type: ObjectProperty

applicable US Customary unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

order
range: nonNegativeInteger
type: DatatypeProperty

data encoding
range: Data Encoding
type: ObjectProperty

bit order
range: Endian Type
type: ObjectProperty

base unit dimensions
range: string
description: "qudt:baseUnitDimensions" is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units.
type: DatatypeProperty

Quantity Kind Dimension Vector
subclass of: Restriction
  on property: dimension exponent for electric current
  cardinality: 1
subclass of: Restriction
  on property: dimensionless exponent
  cardinality: 1
subclass of: QUDT Concept
informative reference: http://en.wikipedia.org/wiki/Dimensional_analysis
subclass of: Restriction
  on property: dimension exponent for length
  cardinality: 1
subclass of: Restriction
  on property: dimension exponent for time
  cardinality: 1
subclass of: Restriction
  on property: base unit dimensions
  max cardinality: 1
type: Class
informative reference: http://web.mit.edu/2.25/www/pdf/DA_unified.pdf
subclass of: Restriction
  on property: latex definition
  max cardinality: 1
subclass of: Restriction
  on property: dimension exponent for mass
  cardinality: 1
subclass of: Restriction
  on property: dimension exponent for amount of substance
  cardinality: 1
subclass of: Restriction
  on property: dimension exponent for thermodynamic temperature
  cardinality: 1
subclass of: Restriction
  on property: dimension exponent for luminous intensity
  cardinality: 1
comment: A Quantity Kind Dimension Vector describes the dimensionality of a quantity kind in the context of a system of units. In the SI system of units, the dimensions of a quantity kind are expressed as a product of the basic physical dimensions mass (\(M\)), length (\(L\)), time (\(T\)) current (\(I\)), amount of substance (\(N\)), luminous intensity (\(J\)) and absolute temperature (\(\theta\)) as \(dim \, Q = L^{\alpha} \, M^{\beta} \, T^{\gamma} \, I ^{\delta} \, \theta ^{\epsilon} \, N^{\eta} \, J ^{\nu}\). The rational powers of the dimensional exponents, \(\alpha, \, \beta, \, \gamma, \, \delta, \, \epsilon, \, \eta, \, \nu\), are positive, negative, or zero. For example, the dimension of the physical quantity kind \(\it{speed}\) is \(\boxed{length/time}\), \(L/T\) or \(LT^{-1}\), and the dimension of the physical quantity kind force is \(\boxed{mass \times acceleration}\) or \(\boxed{mass \times (length/time)/time}\), \(ML/T^2\) or \(MLT^{-2}\) respectively.

applicable SI unit
sub property of: applicable unit
range: Unit
type: ObjectProperty

Signed Integer Encoding
bytes: 4
type: Integer Encoding

normative reference
range: anyURI
description: Provides a way to reference information that is an authorative source providing a standard definition
type: AnnotationProperty

has dimension vector
range: Quantity Kind Dimension Vector
type: ObjectProperty

CGS ESU Dimension vector
subclass of: CGS Dimension vector
comment: A CGS ESU Dimension Vector is used to specify the dimensions for ESU C.G.S. quantity kind.
type: Class

standard uncertainty
range: double
description: The standard uncertainty of a quantity is the estimated standard deviation of the mean taken from a series of measurements.
type: DatatypeProperty

quantity value
range: Quantity value
type: ObjectProperty

normative reference (ISO)
sub property of: normative reference
range: anyURI
description: Provides a way to reference the ISO unit definition.
type: AnnotationProperty

Char Encoding Type
subclass of: Encoding
description: The class of all character encoding schemes, each of which defines a rule or algorithm for encoding character data as a sequence of bits or bytes.
type: Class

Integer Encoding
subclass of: Encoding
description: The encoding scheme for integer types
type: Class

numerator dimension vector
range: Quantity Kind Dimension Vector
type: ObjectProperty

generalization
inverse of: specialization
description: This property relates a quantity kind to its generalization. A quantity kind, PARENT, is a generalization of the quantity kind CHILD only if: 1. PARENT and CHILD have the same dimensions in every system of quantities; 2. Every unit that is a measure of quantities of kind CHILD is also a valid measure of quantities of kind PARENT.
type: ObjectProperty

Enumeration
subclass of: Enumeration
subclass of: QUDT Concept
subclass of: Restriction
  on property: default
  max cardinality: 1
subclass of: Restriction
  on property: default
  all values from: Enumerated Value
comment: An enumeration is a set of literals from which a single value is selected. Each literal can have a tag as an integer within a standard encoding appropriate to the range of integer values. Consistency of enumeration types will allow them, and the enumerated values, to be referred to unambiguously either through symbolic name or encoding. Enumerated values are also controlled vocabularies and as such need to be standardized. Without this consistency enumeration literals can be stated differently and result in data conflicts and misinterpretations. The tags are a set of positive whole numbers, not necessarily contiguous and having no numerical significance, each corresponding to the associated literal identifier. An order attribute can also be given on the enumeration elements. An enumeration can itself be a member of an enumeration. This allows enumerations to be enumerated in a selection. Enumerations are also subclasses of Scalar Datatype. This allows them to be used as the reference of a datatype specification.
subclass of: Restriction
  on property: element
  all values from: Enumerated Value
subclass of: Restriction
  on property: abbreviation
  max cardinality: 1
dbpedia match: http://dbpedia.org/resource/Enumeration
informative reference: http://en.wikipedia.org/wiki/Enumeration
informative reference: http://en.wikipedia.org/wiki/Enumerated_type
subclass of: Restriction
  on property: element
  min cardinality: 1
type: Class

numeric value
range: numericUnion
type: DatatypeProperty

qudt description
sub property of: description
range: HTML
type: AnnotationProperty

math definition
range: string
type: AnnotationProperty

element kind
type: ObjectProperty

example
comment: The 'qudt:example' property is used to annotate an instance of a class with a reference to a concept that is an example. The type of this property is 'rdf:Property'. This allows both scalar and object ranges.
type: AnnotationProperty

has coherent derived unit
inverse of: is non-coherent derived unit of system
sub property of: derived unit
type: ObjectProperty

Single Precision Real Encoding
bytes: 64
type: Floating Point Encoding

Little Endian
literal: little
type: Endian Type

rights
range: string
type: AnnotationProperty

allowed unit of system
inverse of: allowed unit
sub property of: is unit of system
description: This property relates a unit of measure with a unit system that does not define the unit, but allows its use within the system. An allowed unit must be convertible to some dimensionally eqiuvalent unit that is defined by the system.
type: ObjectProperty

length
range: integer
type: Property

dimension exponent for thermodynamic temperature
sub property of: dimension exponent
type: DatatypeProperty

UTF-16 String
type: String Encoding Type

MySQL name
range: string
type: DatatypeProperty

Char Encoding
bytes: 1
description: 7 bits of 1 octet
type: Char Encoding Type
type: Boolean encoding type

has dimension
type: ObjectProperty

Positive delta limit
range: string
description: A positive change limit between consecutive sample values for a parameter. The Positive Delta may be the encoded value or engineering units value depending on whether or not a Calibrator is defined.
type: DatatypeProperty

prefix unit
sub property of: defined unit
type: ObjectProperty

case-insensitive UCUM term
with restrictions:
  pattern: [\x21,\x23-\x27,\x2a,\x2c,\x30-\x3c,\x3e-\x5a,\x5c,\x5e-\x60,\x7c,\x7e]+
on datatype: string
deprecated: true
subclass of: Resource
comment: Lexical pattern for the terminal symbols in the case-insensitive version of UCUM code
type: Datatype

base CGS unit dimensions
sub property of: base unit dimensions
range: string
description: qudt:baseCGSUnitDimensions is a string datatype property expressing the dimensions of a unit, or quantity, as a vector over the base units in the CGS System.
type: DatatypeProperty

is coherent unit of system
inverse of: coherent unit
sub property of: defined unit of system
range: System of Units
description: A coherent unit of measurement for a unit system is a defined unit that may be expressed as a product of powers of the system's base units with the proportionality factor of one. A system of units is coherent with respect to a system of quantities and equations if the system of units is chosen in such a way that the equations between numerical values have exactly the same form (including the numerical factors) as the corresponding equations between the quantities. For example, the 'newton' and the 'joule'. These two are, respectively, the force that causes one kilogram to be accelerated at 1 metre per second per second, and the work done by 1 newton acting over 1 metre. Being coherent refers to this consistent use of 1. In the old c.g.s. system , with its base units the centimetre and the gram, the corresponding coherent units were the dyne and the erg, respectively the force that causes 1 gram to be accelerated at 1 centimetre per second per second, and the work done by 1 dyne acting over 1 centimetre. So \(1 newton = 10^5\,dyne\), \(1 joule = 10^7\,erg\), making each of the four compatible in a decimal sense within its respective other system, but not coherent therein.
type: ObjectProperty
type: DeprecatedProperty

String Encoding Type
subclass of: Encoding
description: A "Encoding" with the following instance(s): "UTF-16 String", "UTF-8 Encoding".
type: Class

bounded
type: Property

upper bound
range: anySimpleType
type: DatatypeProperty

field code
range: string
description (plain text): A field code is a generic property for representing unique codes that make up other identifers. For example each QuantityKind class caries a domain code as its field code.
type: AnnotationProperty

Ordered type
one of: Unordered
one of: Partially Ordered
one of: Totally Ordered
subclass of: Enumerated Value
description: Describes how a data or information structure is ordered.
type: Class

Structured Data Type
subclass of: Restriction
  on property: element type
  max cardinality: 1
subclass of: QUDT Datatype
description: A "Structured Datatype", in contrast to scalar data types, is used to characterize classes of more complex data structures, such as linked or indexed lists, trees, ordered trees, and multi-dimensional file formats.
type: Class

Nominal scale
subclass of: Scale
comment: A nominal scale differentiates between items or subjects based only on their names or (meta-)categories and other qualitative classifications they belong to; thus dichotomous data involves the construction of classifications as well as the classification of items. Discovery of an exception to a classification can be viewed as progress. Numbers may be used to represent the variables but the numbers do not have numerical value or relationship: For example, a Globally unique identifier. Examples of these classifications include gender, nationality, ethnicity, language, genre, style, biological species, and form. In a university one could also use hall of affiliation as an example.
informative reference: https://en.wikipedia.org/wiki/Level_of_measurement
type: Class

creator
range: string
type: AnnotationProperty

symbol
sub property of: literal
range: string
description: The symbol is a glyph that is used to represent some concept, typically a unit or a quantity, in a compact form. For example, the symbol for an Ohm is \(ohm\). This contrasts with 'unit:abbreviation', which gives a short alphanumeric abbreviation for the unit, 'ohm' for Ohm.
type: DatatypeProperty

abbreviation
range: string
description: 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.
type: DatatypeProperty

dimensionless exponent
sub property of: dimension exponent
type: DatatypeProperty

abstract
range: string
type: AnnotationProperty

C Language name
range: string
comment: Datatype name in the C programming language
type: Property

Figure
subclass of: Restriction
  on property: image location
  cardinality: 1
subclass of: Restriction
  on property: figure label
  max cardinality: 1
subclass of: Restriction
  on property: height
  max cardinality: 1
subclass of: Restriction
  on property: figure caption
  max cardinality: 1
subclass of: Restriction
  on property: image
  max cardinality: 1
subclass of: QUDT Concept
type: Class
subclass of: Restriction
  on property: width
  max cardinality: 1
subclass of: Restriction
  on property: landscape
  max cardinality: 1

has unit system
type: ObjectProperty
type: FunctionalProperty

is metric unit
range: boolean
type: DatatypeProperty

Uncountable Cardinality Type
literal: uncountable
description: Any set with cardinality greater than that of the natural numbers, or \(| X | \; > \; | \mathbb N | \), for example \(| R| \; = \; c \; > |\mathbb N |\), is said to be uncountable.
type: Cardinality Type

Vusal Basic name
range: string
type: Property

specialization
inverse of: generalization
description: This property relates a quantity kind to its specialization(s). For example, linear velocity and angular velocity are both specializations of velocity.
type: ObjectProperty

Single Precision Real Encoding
bytes: 32
type: Floating Point Encoding