MUO - Measurement Units Ontology

IRI:
http://elite.polito.it/ontologies/muo-vocab.owl#
Date:
2008
Authors:
Diego Berrueta and Luis Polo
Other visualisation:
Ontology source
(c) MyMobileWeb project, 2008

Abstract

Classes and properties of this ontology have been designed by the MyMobileWeb project. Since the original MUO ontology (http://http://purl.oclc.org/NET/muo/muo) is not available, this is a temporary and self-hosted copy.

Table of Content

  1. Classes
  2. Object Properties
  3. Data Properties
  4. Annotation Properties
  5. Namespace Declarations

Classes

Base unitc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#BaseUnit

Base units are units that have not been derived from any other unit. In turn, base units can be used to derive other measurement units.
has super-classes
Unit of measurementc
is disjoint with
Derived unit of measurementc

Complex derived unit of measurementc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#ComplexDerivedUnit

Units that are derived from two or more measurement units (i.e. a derived unit which is defined by means of more than one unit in its dimensional equation). For instance, the complex derived unit meter per second squared is defined by a dimensional equation with two units: m and s2.
has super-classes
Derived unit of measurementc
is disjoint with
Derived unit of measurement made out of exactly one base unitc

Derived unit of measurementc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#DerivedUnit

Some physical qualities (such as area, acceleration, etc.), called derived physical qualities, are defined in terms of base qualities via a system of dimensional equations. The derived units for derived qualities are obtained from these equations combinated with the base units.
has super-classes
Unit of measurementc
has sub-classes
Complex derived unit of measurementc, Derived unit of measurement made out of exactly one base unitc
is in domain of
Derives fromop
is disjoint with
Base unitc

Derived unit of measurement made out of exactly one base unitc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#SimpleDerivedUnit

Units that are derived from exactly one base unit. There are two main possibilities. On one hand, there are units that are derived by adding a prefix to the unit. The prefix is a name or associated symbol (e.g. kilo) that precedes a unit of measure (e.g. meter) to form a decimal multiple or submultiple (e.g. Kilometer). Derived units, obtained by the application of a prefix, measure the same physical quality as its base unit. On the other hand, there are another kind of simple derived units that are also obtained from exactly one base unit but they measure a different physical quality. They are obtained by changing the exponent of the unit in the dimensional equation. For instance, this is how square meters are derived from meters. This exponent is represented in MUO with the datatype property muo:dimensionalSize. Combining this two patterns we can represent units that are obtained from a prefix and that have a dimension size different from 1, for instance, the unit square kilometer.
has super-classes
Derived unit of measurementc
is in domain of
Dimensional sizedp, Unit prefixop
is disjoint with
Complex derived unit of measurementc

Metric unitc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#MetricUnit

FIX
has super-classes
Unit of measurementc

Physical qualityc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#PhysicalQuality

The physical qualities such as mass, weight, speed, etc. are kind of properties that can be quantified i.e. that can be perceived, measured or even calculated. The concept of physical quality is similar to the notion of quality, used in metrology, the science of measurement. We distinguish between: 1) A physical quality in the general sense: a kind of physical property ascribed to phenomena that can be quantified for a particular phenomenon (e.g. length and electrical charge); 2) A physical quantity in the particular sense: a quantifiable property ascribed to a particular phenomenon (e.g. the weight of my device). MUO only uses physical quantities in the general sense.
is in range of
Measures qualityop
is disjoint with
Unit of measurementc, Prefixc

Prefixc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#Prefix

A prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple. Prefixes are used to reduce the quantity of zeroes in numerical equivalencies. For instance, 1000 meters can be written as 1 kilometer, using the prefix kilo, a symbol to represent the number 1000.
is in domain of
Factordp
is in range of
Unit prefixop
is disjoint with
Unit of measurementc, Physical qualityc

Quality valuec back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#QualityValue

The value of an individual quality, for instance, the weight of an individual object. If we consider metrology, the value of a physical quality Q is expressed as the product of a numerical value {Q} and a physical unit [Q]: Q = {Q} x [Q]. In MUO, the class muo:QualityValue is used to represent the values of qualities, Q. Instances of this class are related with 1) exactly one unit, suitable for measure the physical quality (meters for length, grams for weight, etc), by means of the property muo:measuredIn, [Q]; 2) a number, which express the relationship between the value and the unit by means of the rdf:value property, {Q}; 3) a time, which expresses the quality value along the line of time. Quality values can be temporalized, but this is not always necessary.
is in domain of
In Timedp, Measured inop
is in range of
Quality valueop

SI unitc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#SIUnit

Unit belonging to the International System of Units. The SI recognizes several base and derived units for some physical qualities assumed to be mutually independent.
has super-classes
Unit of measurementc

Unit of measurementc back to ToC or Class ToC

IRI: http://elite.polito.it/ontologies/dogont.owl#UnitOfMeasurement

Measurement units are standards for measurement of physical properties or qualities. Every unit is related to a particular kind of property. For instance, the meter unit is uniquely related to the length property. Under our ontological approach, units are abstract spaces used as a reference metrics for quality spaces, such as physical qualia, and they are counted by some number. For instance, weight-units define some quality spaces for the weight-quality where specific weights of objects, like devices or persons, are located by means of comparisons with the proper weight-value of the selected weight-unit.
has sub-classes
Base unitc, Derived unit of measurementc, Metric unitc, SI unitc
is in domain of
Measures qualityop
is in range of
Derives fromop, Measured inop
is disjoint with
Physical qualityc, Prefixc

Object Properties

Derives fromop back to ToC or Object Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#derivesFrom

This property relates a unit with another unit from which the former is derived. For instance, square meter derives from meter.
has domain
Derived unit of measurementc
has range
Unit of measurementc

Measured inop back to ToC or Object Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#measuredIn

The unit used in the measurement of a particular quality value

has characteristics: functional

has domain
Quality valuec
has range
Unit of measurementc

Measures qualityop back to ToC or Object Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#measuresQuality

The physical quality the unit is able to measure.

has characteristics: functional

has domain
Unit of measurementc
has range
Physical qualityc

Quality valueop back to ToC or Object Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#qualityValue

The quality value of a measurable physical quality of an entity or phenomenon.

has characteristics: inverse functional

has range
Quality valuec

Unit prefixop back to ToC or Object Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#modifierPrefix

The modifier prefix that applies to a derived unit of measurement

has characteristics: functional

has domain
Derived unit of measurement made out of exactly one base unitc
has range
Prefixc

Data Properties

Alternate Symboldp back to ToC or Data Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#altSymbol

Alternate (standarized) symbol of the entity
has domain
Unit of measurementc or Prefixc

Dimensional sizedp back to ToC or Data Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#dimensionalSize

The dimensional size of a simple derived unit, i.e., the exponent of the dimension in the dimensional equation. For instance, for square meters, the dimensional size is two.
has domain
Derived unit of measurement made out of exactly one base unitc
has range
float

Factordp back to ToC or Data Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#factor

Modification factor that multiples the base value of the unit
has domain
Prefixc

In Timedp back to ToC or Data Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#inTime

The time of a particular quality value (e.g. the weight of Carlos yesterday).

has characteristics: functional

has domain
Quality valuec
has range
date time

Preferred Symboldp back to ToC or Data Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#prefSymbol

Standarized symbol of the entity

has characteristics: functional

has domain
Unit of measurementc or Prefixc

Annotation Properties

creatorap back to ToC or Annotation Property ToC

IRI: http://purl.org/dc/elements/1.1/creator

dateap back to ToC or Annotation Property ToC

IRI: http://purl.org/dc/elements/1.1/date

equivalent object propertyap back to ToC or Annotation Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#equivalentObjectProperty

Preferred Unitap back to ToC or Annotation Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#preferredUnit

The user-preferred unit for measuring the values of a muo:qualityValue subproperty (e.g. weight). This information is used by the conversion service to convert a value expressed in one unit to the preferred one.

Property Measures Qualityap back to ToC or Annotation Property ToC

IRI: http://elite.polito.it/ontologies/muo-vocab.owl#propertyMeasuresQuality

The physical quality measured by a muo:qualityValue subproperty (e.g. weight).

rightsap back to ToC or Annotation Property ToC

IRI: http://purl.org/dc/elements/1.1/rights

Namespace Declarations back to ToC

default namespace
http://elite.polito.it/ontologies/muo-vocab.owl#
dc
http://purl.org/dc/elements/1.1/
dogont-owl
http://elite.polito.it/ontologies/dogont.owl#
muo-vocab
http://elite.polito.it/ontologies/muo-vocab.owl#
owl
http://www.w3.org/2002/07/owl#
rdf
http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs
http://www.w3.org/2000/01/rdf-schema#
xsd
http://www.w3.org/2001/XMLSchema#

This HTML document was obtained by processing the OWL ontology source code through LODE, Live OWL Documentation Environment, developed by Silvio Peroni.