http://creativecommons.org/licenses/by/3.0/
Megan Katsumi
Ontology to capture concepts related to measurements in order to provide a structured vocabulary to describe, among other things, the different values (measures) that we associate to given quantities. This allows us to provide greater detail regarding specific measurements that are defined in the ontology. Rather than simply have a simple data property to describe the length of some road segment as "10 m", with the units of measure ontology we are able to describe the nature of the quantity (i.e. length), its value as a Measure (10 m), and also describe the unit that the measure's numerical value is given in (e.g. metres).
The iCity-OM Ontology reuses a small subset of the entire Units of Measure (OM) ontology.
November 8, 2017
The Ontology of Units of Measure
icity-om
Developed as part of the overall iCity ontology effort, the iCity-OM Ontology is designed to capture concepts related to units of measure.
Copyright @ 2016 Megan Katsumi, iCity Research Group
Changes from previous version:
-combined with MonetaryValue ontology
-added units required for network representation (lane capacity, etc).
-updated imports from OM to new version, OM 2.0
http://ontology.eil.utoronto.ca/icity/OM/1.1/
1.2
Under development. Please see report on iCity Ontology v1.
Annotation property introduced for organization purposes, to identify annotation properties defined in the Units of Measure Ontology.
The WGS84 altitude of a SpatialThing (decimal meters
above the local reference ellipsoid).
altitude
Day of month - formulated as a text string with a pattern constraint to reproduce the same lexical form as gDay, except that values up to 99 are permitted, in order to support calendars with more than 31 days in a month.
Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.
Generalized day
Day of month - generalization of xsd:gDay, formulated as a text string with a pattern constraint to reproduce the same lexical form as gDay, except that values up to 99 are permitted, in order to support calendars with more than 31 days in a month. Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.
Month of year - formulated as a text string with a pattern constraint to reproduce the same lexical form as gMonth, except that values up to 20 are permitted, in order to support calendars with more than 12 months in the year.
Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.
Generalized month
Month of year - generalization of xsd:gMonth, formulated as a text string with a pattern constraint to reproduce the same lexical form as gMonth, except that values up to 20 are permitted, in order to support calendars with more than 12 months in the year. Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.
base
has base
base quantity
has base quantity
base unit
has base unit
replaces unit_of_measure
denominatot
has denominatot
derived quantity
has derived quantity
replace property: phenomenon
replaces property: term_1
replaces property: term_2
replaces property:unit_of_measure
replaces property: value
measurement scale
has measurement scale
numerator
has numerator
phenomenon
has phenomenon
prefix
has prefix
singular unit
has singular unit
term 1
has term 1
term 2
has term 2
For quantity classes this property indicates a commonly-used unit.
unit of measure
has unit of measure
value
has denominator
has numerator
has unit
has value
Property added for organizational purposes, to identify properties defined in the Time Ontology.
Gives directionality to time. If a temporal entity T1 is after another temporal entity T2, then the beginning of T1 is after the end of T2.
after
Gives directionality to time. If a temporal entity T1 is after another temporal entity T2, then the beginning of T1 is after the end of T2.
Gives directionality to time. If a temporal entity T1 is before another temporal entity T2, then the end of T1 is before the beginning of T2. Thus, "before" can be considered to be basic to instants and derived for intervals.
before
Gives directionality to time. If a temporal entity T1 is before another temporal entity T2, then the end of T1 is before the beginning of T2. Thus, "before" can be considered to be basic to instants and derived for intervals.
The day of week, whose value is a member of the class time:DayOfWeek
day of week
The day of week, whose value is a member of the class time:DayOfWeek
Beginning of a temporal entity
has beginning
Beginning of a temporal entity.
Value of DateTimeInterval expressed as a structured value. The beginning and end of the interval coincide with the limits of the shortest element in the description.
has Date-Time description
Value of DateTimeInterval expressed as a structured value. The beginning and end of the interval coincide with the limits of the shortest element in the description.
Duration of a temporal entity, expressed as a scaled value or nominal value
has duration
Duration of a temporal entity, event or activity, or thing, expressed as a scaled value
Duration of a temporal entity, expressed using a structured description
has duration description
Duration of a temporal entity, expressed using a structured description
End of a temporal entity.
has end
End of a temporal entity.
The temporal reference system used by a temporal position or extent description.
Temporal reference system used
The temporal reference system used by a temporal position or extent description.
Duration of a temporal entity.
has temporal duration
Duration of a temporal entity.
Supports the association of a temporal entity (instant or interval) to any thing
has time
Supports the association of a temporal entity (instant or interval) to any thing
Feature at risk - added in 2017 revision, and not yet widely used.
Position of an instant, expressed using a structured description
in date-time description
Position of an instant, expressed using a structured description
Position of a time instant
Temporal position
Position of a time instant
Position of an instant, expressed as a temporal coordinate or nominal value
Time position
Position of a time instant expressed as a TimePosition
An instant that falls inside the interval. It is not intended to include beginnings and ends of intervals.
has time instant inside
An instant that falls inside the interval. It is not intended to include beginnings and ends of intervals.
If a proper interval T1 is intervalAfter another proper interval T2, then the beginning of T1 is after the end of T2.
interval after
If a proper interval T1 is intervalAfter another proper interval T2, then the beginning of T1 is after the end of T2.
If a proper interval T1 is intervalBefore another proper interval T2, then the end of T1 is before the beginning of T2.
interval before
If a proper interval T1 is intervalBefore another proper interval T2, then the end of T1 is before the beginning of T2.
If a proper interval T1 is intervalContains another proper interval T2, then the beginning of T1 is before the beginning of T2, and the end of T1 is after the end of T2.
interval contains
If a proper interval T1 is intervalContains another proper interval T2, then the beginning of T1 is before the beginning of T2, and the end of T1 is after the end of T2.
If a proper interval T1 is intervalDisjoint another proper interval T2, then the beginning of T1 is after the end of T2, or the end of T1 is before the beginning of T2, i.e. the intervals do not overlap in any way, but their ordering relationship is not known.
interval disjoint
If a proper interval T1 is intervalDisjoint another proper interval T2, then the beginning of T1 is after the end of T2, or the end of T1 is before the beginning of T2, i.e. the intervals do not overlap in any way, but their ordering relationship is not known.
This interval relation is not included in the 13 basic relationships defined in Allen (1984), but is defined in (T.3) as the union of :intervalBefore v :intervalAfter . However, that is outside OWL2 expressivity, so is implemented as an explicit property, with :intervalBefore , :intervalAfter as sub-properties
If a proper interval T1 is intervalDuring another proper interval T2, then the beginning of T1 is after the beginning of T2, and the end of T1 is before the end of T2.
interval during
If a proper interval T1 is intervalDuring another proper interval T2, then the beginning of T1 is after the beginning of T2, and the end of T1 is before the end of T2.
If a proper interval T1 is intervalEquals another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is coincident with the end of T2.
interval equals
If a proper interval T1 is intervalEquals another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is coincident with the end of T2.
If a proper interval T1 is intervalFinishedBy another proper interval T2, then the beginning of T1 is before the beginning of T2, and the end of T1 is coincident with the end of T2.
interval finished by
If a proper interval T1 is intervalFinishedBy another proper interval T2, then the beginning of T1 is before the beginning of T2, and the end of T1 is coincident with the end of T2.
If a proper interval T1 is intervalFinishes another proper interval T2, then the beginning of T1 is after the beginning of T2, and the end of T1 is coincident with the end of T2.
interval finishes
If a proper interval T1 is intervalFinishes another proper interval T2, then the beginning of T1 is after the beginning of T2, and the end of T1 is coincident with the end of T2.
If a proper interval T1 is intervalIn another proper interval T2, then the beginning of T1 is after the beginning of T2 or is coincident with the beginning of T2, and the end of T1 is before the end of T2, or is coincident with the end of T2, except that end of T1 may not be coincident with the end of T2 if the beginning of T1 is coincident with the beginning of T2.
interval in
If a proper interval T1 is intervalIn another proper interval T2, then the beginning of T1 is after the beginning of T2 or is coincident with the beginning of T2, and the end of T1 is before the end of T2, or is coincident with the end of T2, except that end of T1 may not be coincident with the end of T2 if the beginning of T1 is coincident with the beginning of T2.
This interval relation is not included in the 13 basic relationships defined in Allen (1984), but is referred to as 'an important relationship' in Allen and Ferguson (1997). It is the disjoint union of :intervalStarts v :intervalDuring v :intervalFinishes . However, that is outside OWL2 expressivity, so is implemented as an explicit property, with :intervalStarts , :intervalDuring , :intervalFinishes as sub-properties
If a proper interval T1 is intervalMeets another proper interval T2, then the end of T1 is coincident with the beginning of T2.
interval meets
If a proper interval T1 is intervalMeets another proper interval T2, then the end of T1 is coincident with the beginning of T2.
If a proper interval T1 is intervalMetBy another proper interval T2, then the beginning of T1 is coincident with the end of T2.
interval met by
If a proper interval T1 is intervalMetBy another proper interval T2, then the beginning of T1 is coincident with the end of T2.
If a proper interval T1 is intervalOverlappedBy another proper interval T2, then the beginning of T1 is after the beginning of T2, the beginning of T1 is before the end of T2, and the end of T1 is after the end of T2.
interval overlapped by
If a proper interval T1 is intervalOverlappedBy another proper interval T2, then the beginning of T1 is after the beginning of T2, the beginning of T1 is before the end of T2, and the end of T1 is after the end of T2.
If a proper interval T1 is intervalOverlaps another proper interval T2, then the beginning of T1 is before the beginning of T2, the end of T1 is after the beginning of T2, and the end of T1 is before the end of T2.
interval overlaps
If a proper interval T1 is intervalOverlaps another proper interval T2, then the beginning of T1 is before the beginning of T2, the end of T1 is after the beginning of T2, and the end of T1 is before the end of T2.
If a proper interval T1 is intervalStarted another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is after the end of T2.
interval started by
If a proper interval T1 is intervalStarted another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is after the end of T2.
If a proper interval T1 is intervalStarts another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is before the end of T2.
interval starts
If a proper interval T1 is intervalStarts another proper interval T2, then the beginning of T1 is coincident with the beginning of T2, and the end of T1 is before the end of T2.
The month of the year, whose value is a member of the class time:MonthOfYear
month of year
The month of the year, whose value is a member of the class time:MonthOfYear
Feature at risk - added in 2017 revision, and not yet widely used.
The time zone for clock elements in the temporal position
in time zone
In the original 2006 version of OWL-Time, the range of time:timeZone was a TimeZone class in a separate namespace "http://www.w3.org/2006/timezone#".
An alignment axiom
tzont:TimeZone rdfs:subClassOf time:TimeZone .
allows data encoded according to the previous version to be consistent with the updated ontology.
IANA maintains a database of timezones. These are well maintained and generally considered authoritative, but individual items are not available at individual URIs, so cannot be used directly in data expressed using OWL-Time.
DBPedia provides a set of resources corresponding to the IANA timezones, with a URI for each (e.g. http://dbpedia.org/resource/Australia/Eucla). The World Clock service also provides a list of time zones with the description of each available as an individual webpage with a convenient individual URI (e.g. https://www.timeanddate.com/time/zones/acwst). These or other, similar, resources might be used as a value of the time:timeZone property.
The temporal unit which provides the precision of a date-time value or scale of a temporal extent
temporal unit type
exponent
has exponent
factor
has factor
Replaces property: numerical_value
numerical value
has numerical value
rank
has rank
Data property introduced for organization purposes, to identify data properties defined in the Units of Measure Ontology.
Data property added for organizational purposes, to identify data properties defined in the Time Ontology.
Day position in a calendar-clock system.
The range of this property is not specified, so can be replaced by any specific representation of a calendar day from any calendar.
day
Day position in a calendar-clock system.
The range of this property is not specified, so can be replaced by any specific representation of a calendar day from any calendar.
The number of the day within the year
day of year
The number of the day within the year
length of, or element of the length of, a temporal extent expressed in days
days duration
length of, or element of the length of, a temporal extent expressed in days
Extent of a temporal entity, expressed using xsd:duration
has XSD duration
Extent of a temporal entity, expressed using xsd:duration
Feature at risk - added in 2017 revision, and not yet widely used.
Hour position in a calendar-clock system.
hour
Hour position in a calendar-clock system.
length of, or element of the length of, a temporal extent expressed in hours
hours duration
length of, or element of the length of, a temporal extent expressed in hours
Position of an instant, expressed using xsd:date
in XSD date
Position of an instant, expressed using xsd:date
Position of an instant, expressed using xsd:dateTime
in XSD Date-Time
true
Position of an instant, expressed using xsd:dateTime
The property :inXSDDateTime is replaced by :inXSDDateTimeStamp which makes the time-zone field mandatory.
Position of an instant, expressed using xsd:dateTimeStamp
in XSD Date-Time-Stamp
Position of an instant, expressed using xsd:dateTimeStamp
Position of an instant, expressed using xsd:gYear
in XSD g-Year
Position of an instant, expressed using xsd:gYear
Position of an instant, expressed using xsd:gYearMonth
in XSD g-YearMonth
Position of an instant, expressed using xsd:gYearMonth
Minute position in a calendar-clock system.
minute
Minute position in a calendar-clock system.
length, or element of, a temporal extent expressed in minutes
minutes
length, or element of, a temporal extent expressed in minutes
Month position in a calendar-clock system.
The range of this property is not specified, so can be replaced by any specific representation of a calendar month from any calendar.
month
Month position in a calendar-clock system.
The range of this property is not specified, so can be replaced by any specific representation of a calendar month from any calendar.
length of, or element of the length of, a temporal extent expressed in months
months duration
length of, or element of the length of, a temporal extent expressed in months
The (nominal) value indicating temporal position in an ordinal reference system
Name of temporal position
The (nominal) value indicating temporal position in an ordinal reference system
Value of a temporal extent expressed as a decimal number scaled by a temporal unit
Numeric value of temporal duration
Value of a temporal extent expressed as a decimal number scaled by a temporal unit
The (numeric) value indicating position within a temporal coordinate system
Numeric value of temporal position
The (numeric) value indicating position within a temporal coordinate system
Second position in a calendar-clock system.
second
length of, or element of the length of, a temporal extent expressed in seconds
seconds duration
Week number within the year.
week
Weeks are numbered differently depending on the calendar in use and the local language or cultural conventions (locale). ISO-8601 specifies that the first week of the year includes at least four days, and that Monday is the first day of the week. In that system, week 1 is the week that contains the first Thursday in the year.
length of, or element of the length of, a temporal extent expressed in weeks
weeks duration
Value of DateTimeInterval expressed as a compact value.
has XSD date-time
true
Using xsd:dateTime in this place means that the duration of the interval is implicit: it corresponds to the length of the smallest non-zero element of the date-time literal. However, this rule cannot be used for intervals whose duration is more than one rank smaller than the starting time - e.g. the first minute or second of a day, the first hour of a month, or the first day of a year. In these cases the desired interval cannot be distinguished from the interval corresponding to the next rank up. Because of this essential ambiguity, use of this property is not recommended and it is deprecated.
Year position in a calendar-clock system.
The range of this property is not specified, so can be replaced by any specific representation of a calendar year from any calendar.
year
length of, or element of the length of, a temporal extent expressed in years
years duration
has numerical value
Just as the meter is the unit of measure for length, a gci:Cardinality_unit is the unit of measure for the size of a set. The gci:Cardinality_unit is a ratio scale: gci:Cardinality_scale, which is a subclass of om:Ratio_scale and is has a zero element (namely zero).
Reused from GCI Foundation Ontology
Cardinality Unit
1
1
The govstat Population is specialized for indicator use to include what defines a member of the population, the location of the population, and the time the population was measured.
Reused from GCI Foundation ontology
Population Measure
gci:Cardinality_unit is the unit of measure for the size of a set. The gci:Cardinality_unit is a ratio scale: gci:Cardinality_scale, which is a subclass of om:Ratio_scale and is has a zero element (namely zero).
1
Reused from GCI Foundation ontology: http://ontology.eil.utoronto.ca/GCI/Foundation/GCI-Foundation-v2.owl
gci:Population_size is a subclass of om:Quantity. Its om:unit_of_measure is the gci:population_cardinality_unit. It is also a subclass of gs:Cardinality which provides the cardinality_of property that links to a gs:Population.
Population Size
cardinal scale
1
Cardinality of the Population.
Note that there is no property that links Cardinality to a Variable.
1
compound unit
1
Distinct_count class that is a Parameter that represents
the number of distinct values of a property of the members of a
Population
fixed point
0
fixed zero point
1
1
An indicator is a quantity that is a ratio of a numerator and denominator that are also quantities. It has a city and time period associated with it. The numerator and denominator quantities can have different units of measure. One example of a unit of measure is the size of a population. A population_cardinality_unit is defined to be an individual of a Cardinality_unit that is a subclass of a Singular_unit.
interval scale
1
Mean represents the mean value of a property all members of the Population have and is specified by the parameter_of_var property.
1
1
1
A measure combines a number to a unit of measure or an interval or ratio scale. For example, "3 m" is a measure.
measure
Measurement scales are concepts used for the expression of quantities. Four types of measurement scales are: nominal scales, ordinal scales, interval scales and ratio scales. The latter two scales are also called cardinal scales. An example of a scale is the Celsius scale, a temperature scale.
measurement scale
scale
nominal scale
1
Observation
ordinal scale
1
Parameter is the Class of all measures that can be made of a Population, both statistical, e.g., Mean, Starndard_devation, and others, e.g., Cardinality, Sum.
A phenomenon is the qualitative object (e.g., food, star, molecule) that has quantifiable (standardized) aspects (e.g, length, mass, time).
phenomenon
A point is an element of an interval scale or a ratio scale, for example, 273.16 on the Kelvin scale indicates the triple point of water thermodynamic temperature.
point
1
The core class is the Population to be measured. A Population is linked to a parameter (e.g., mean, standard deviation, cardinality) by the is_described_by property, and the parameter is a sub class of Parameter. Depending on the subclass of Parameter, there is a reverse link back to the Population.
parameter links back to the using cardinality_of. parameter links back using the property. parameter links back using the mean_of property.
Population
A prefix is a name that precedes a basic unit of measure to indicate a decimal multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol. For example, an electric current of 0.000 000 001 ampere is written by using the SI-prefix nano as 1 nanoampere or 1 nA.
prefix
1
1
1
1
1
A quantity is a representation of a quantifiable (standardized) aspect (such as length, mass, and time) of a phenomenon (e.g., a star, food, or a molecule). Quantities are classified according to similarity in (implicit) metrological aspect, e.g. the length of my speedboat and the length of my racing car are classified as length.
quantity
1
1
1
ratio scale
SI prefix
1
1
1
Sum defines the sum over a variable possessed by members of the Population.
1
1
unit division
1
1
unit exponentiation
unit multiple or submultiple
1
1
unit multiplication
A unit of measure is a definite magnitude of a quantity, defined and adopted by convention and/or by law. It is used as a standard for measurement of the same quantity, where any other value of the quantity can be expressed as a simple multiple of the unit of measure. For example, length is a quantity; the metre is a unit of length that represents a definite predetermined length. When we say 10 metre (or 10 m), we actually mean 10 times the definite predetermined length called "metre".
unit of measure
unit
unit of measurement
1
The property that is being measured in the population. Since Protege is not Full DL, cannot make the property a subclass of Variable, so have to specify it as a string name using has_Name.
Variable
acceleration
acceleration unit
amount of money
amount of money unit
Area expresses the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. It is a derived quantity in the International System of Units. Area is length squared.
area
area unit
1
1
1
duration
function
Reference systems to indicate geographic position.
Length is the amount of space between two geographical points along a curve. It is a base quantity in the International System of Units and other systems of units. Length is speed times time. The metre, a base unit of length in the International System of Units, is defined in terms of speed of light during a certain time interval.
length
length unit
Mass is the amount of matter of a phenomenon. It is a base quantity in the International System of Units. Mass is force divided by acceleration.
mass
mass unit
measure
1
A Monetary Value has a numerical value that is relative to a particular date (year).
A Monetary Value is measured with some currency.
quantity
ratio
scale
Speed is the time rate of motion measured by the distance moved over in unit time.
speed
speed unit
In order to achieve a coherent, interdependent set of units of measure in the wide variety of units that exist, units are organised in systems of units. A system of units is based on a set of units chosen by convention to be the system’s base units, units that are considered to be mutually independent (i.e., can’t be expressed in terms of each other).
system of units
time
time unit
unit
unit division
An amount of money that is defined relative to a particular year.
Volume is a measure of how much three-dimensional space any phenomenon occupies. It is a derived quantity in the International System of Units. Volume is length to the power 3.
volume
volume unit
Class added for organizational purposes, to identify classes defined in the Time Ontology.
Description of date and time structured with separate values for the various elements of a calendar-clock system. The temporal reference system is fixed to Gregorian Calendar, and the range of year, month, day properties restricted to corresponding XML Schema types xsd:gYear, xsd:gMonth and xsd:gDay, respectively.
Date-Time description
Description of date and time structured with separate values for the various elements of a calendar-clock system. The temporal reference system is fixed to Gregorian Calendar, and the range of year, month, day properties restricted to corresponding XML Schema types xsd:gYear, xsd:gMonth and xsd:gDay, respectively.
DateTimeInterval is a subclass of ProperInterval, defined using the multi-element DateTimeDescription.
Date-time interval
DateTimeInterval is a subclass of ProperInterval, defined using the multi-element DateTimeDescription.
:DateTimeInterval can only be used for an interval whose limits coincide with a date-time element aligned to the calendar and timezone indicated. For example, while both have a duration of one day, the 24-hour interval beginning at midnight at the beginning of 8 May in Central Europe can be expressed as a :DateTimeInterval, but the 24-hour interval starting at 1:30pm cannot.
The day of week
Day of week
Remove enumeration from definition, in order to allow other days to be used when required in other calendars.
NOTE: existing days are still present as members of the class, but the class membership is now open.
In the original OWL-Time the following constraint appeared:
owl:oneOf (
time:Monday
time:Tuesday
time:Wednesday
time:Thursday
time:Friday
time:Saturday
time:Sunday
) ;
The day of week
Membership of the class :DayOfWeek is open, to allow for alternative week lengths and different day names.
1
1
Duration of a temporal extent expressed as a number scaled by a temporal unit
Time duration
Duration of a temporal extent expressed as a number scaled by a temporal unit
Alternative to time:DurationDescription to support description of a temporal duration other than using a calendar/clock system.
Description of temporal extent structured with separate values for the various elements of a calendar-clock system. The temporal reference system is fixed to Gregorian Calendar, and the range of each of the numeric properties is restricted to xsd:decimal
Duration description
Description of temporal extent structured with separate values for the various elements of a calendar-clock system. The temporal reference system is fixed to Gregorian Calendar, and the range of each of the numeric properties is restricted to xsd:decimal
In the Gregorian calendar the length of the month is not fixed. Therefore, a value like "2.5 months" cannot be exactly compared with a similar duration expressed in terms of weeks or days.
1
1
1
1
1
1
1
1
1
1
1
1
Description of date and time structured with separate values for the various elements of a calendar-clock system
Generalized date-time description
Description of date and time structured with separate values for the various elements of a calendar-clock system
Some combinations of properties are redundant - for example, within a specified :year if :dayOfYear is provided then :day and :month can be computed, and vice versa. Individual values should be consistent with each other and the calendar, indicated through the value of the :hasTRS property.
1
1
1
1
1
1
1
1
Description of temporal extent structured with separate values for the various elements of a calendar-clock system.
Generalized duration description
Description of temporal extent structured with separate values for the various elements of a calendar-clock system.
The extent of a time duration expressed as a GeneralDurationDescription depends on the Temporal Reference System. In some calendars the length of the week or month is not constant within the year. Therefore, a value like "2.5 months" may not necessarily be exactly compared with a similar duration expressed in terms of weeks or days. When non-earth-based calendars are considered even more care must be taken in comparing durations.
A temporal entity with zero extent or duration
Time instant
A temporal entity with zero extent or duration
A temporal entity with an extent or duration
Time interval
A temporal entity with an extent or duration
--01
January
true
This class was present in the 2006 version of OWL-Time. It was presented as an example of how DateTimeDescription could be specialized, but does not belong in the revised ontology.
0
0
0
1
0
0
0
The month of the year
Month of year
The month of the year
Feature at risk - added in 2017 revision, and not yet widely used.
Membership of the class :MonthOfYear is open, to allow for alternative annual calendars and different month names.
A temporal entity with non-zero extent or duration, i.e. for which the value of the beginning and end are different
Proper interval
A temporal entity with non-zero extent or duration, i.e. for which the value of the beginning and end are different
A temporal reference system, such as a temporal coordinate system (with an origin, direction, and scale), a calendar-clock combination, or a (possibly hierarchical) ordinal system.
This is a stub class, representing the set of all temporal reference systems.
Temporal Reference System
A temporal reference system, such as a temporal coordinate system (with an origin, direction, and scale), a calendar-clock combination, or a (possibly hierarchical) ordinal system.
This is a stub class, representing the set of all temporal reference systems.
A taxonomy of temporal reference systems is provided in ISO 19108:2002 [ISO19108], including (a) calendar + clock systems; (b) temporal coordinate systems (i.e. numeric offset from an epoch); (c) temporal ordinal reference systems (i.e. ordered sequence of named intervals, not necessarily of equal duration).
Time extent; duration of a time interval separate from its particular start position
Temporal duration
Time extent; duration of a time interval separate from its particular start position
A temporal interval or instant.
Temporal entity
A temporal interval or instant.
1
A position on a time-line
Temporal position
A position on a time-line
A standard duration, which provides a scale factor for a time extent, or the granularity or precision for a time position.
Temporal unit
Remove enumeration from definition, in order to allow other units to be used when required in other coordinate systems.
NOTE: existing units are still present as members of the class, but the class membership is now open.
In the original OWL-Time the following constraint appeared:
owl:oneOf (
time:unitSecond
time:unitMinute
time:unitHour
time:unitDay
time:unitWeek
time:unitMonth
time:unitYear
) ;
A standard duration, which provides a scale factor for a time extent, or the granularity or precision for a time position.
Membership of the class TemporalUnit is open, to allow for other temporal units used in some technical applications (e.g. millions of years, Baha'i month).
1
1
A temporal position described using either a (nominal) value from an ordinal reference system, or a (numeric) value in a temporal coordinate system.
Time position
A temporal position described using either a (nominal) value from an ordinal reference system, or a (numeric) value in a temporal coordinate system.
A Time Zone specifies the amount by which the local time is offset from UTC.
A time zone is usually denoted geographically (e.g. Australian Eastern Daylight Time), with a constant value in a given region.
The region where it applies and the offset from UTC are specified by a locally recognised governing authority.
Time Zone
A Time Zone specifies the amount by which the local time is offset from UTC.
A time zone is usually denoted geographically (e.g. Australian Eastern Daylight Time), with a constant value in a given region.
The region where it applies and the offset from UTC are specified by a locally recognised governing authority.
In the original 2006 version of OWL-Time, the TimeZone class, with several properties corresponding to a specific model of time-zones, was defined in a separate namespace "http://www.w3.org/2006/timezone#".
In the current version a class with same local name is put into the main OWL-Time namespace, removing the dependency on the external namespace.
An alignment axiom
tzont:TimeZone rdfs:subClassOf time:TimeZone .
allows data encoded according to the previous version to be consistent with the updated ontology.
A designated timezone is associated with a geographic region. However, for a particular region the offset from UTC often varies seasonally, and the dates of the changes may vary from year to year. The timezone designation usually changes for the different seasons (e.g. Australian Eastern Standard Time vs. Australian Eastern Daylight Time). Furthermore, the offset for a timezone may change over longer timescales, though its designation might not.
Detailed guidance about working with time zones is given in http://www.w3.org/TR/timezone/ .
An ontology for time zone descriptions was described in [owl-time-20060927] and provided as RDF in a separate namespace tzont:. However, that ontology was incomplete in scope, and the example datasets were selective. Furthermore, since the use of a class from an external ontology as the range of an ObjectProperty in OWL-Time creates a dependency, reference to the time zone class has been replaced with the 'stub' class in the normative part of this version of OWL-Time.
In this implementation TimeZone has no properties defined. It should be thought of as an 'abstract' superclass of all specific timezone implementations.
0
0
0
0
0
0
1
Year duration
Year
true
Year duration
Year was proposed in the 2006 version of OWL-Time as an example of how DurationDescription could be specialized to allow for a duration to be restricted to a number of years.
It is deprecated in this edition of OWL-Time.
Anno
Année (calendrier)
Ano
Año
Jaar
Jahr
Rok
Year
Год
سنة
年
年
3
0
1000000000
gigapc
100000
hecto_kilo_pc
1000
kilopc
kwh
kwh_per_pc
kwh_per_m2
kwh_per_year
1000000
megapc
m2
0.000001
pc
population_cardinality_unit is depicted to be an instance of Cardinality_unit, which is the unit of measure for the cardinality of a set defined by a Population (defined in the next clause), and is associated with the symbol “pc”. For example, 1100pc represents a population cardinality (or size) of 1100. This document takes advantage of prefix notations to scale the numbers by defining units of measures: kilopc, megapc and gigapc, which are multiples of population_cardinality_unit. 1.1 kilopc represents 1100 pc.
population_ratio_unit is defined to be an instance of Unit_division. It has two properties:
• whose range is restricted to being a population_cardinality_unit;
• whose range is restricted to being a population_cardinality_unit.
In other words, a population ratio is the ratio of two population cardinalities (i.e., number of members/elements in each population)
2
North American Datum of 1983. A geodetic reference system.
World Geodetic System of 1984. The reference system used by GPS.
Friday
Freitag
Friday
Piątek
Sexta-feira
Vendredi
Venerdì
Viernes
Vrijdag
Пятница
الجمعة
星期五
金曜日
Monday
Lundi
Lunedì
Lunes
Maandag
Monday
Montag
Poniedziałek
Segunda-feira
Понедельник
الاثنين
星期一
月曜日
Saturday
Sabato
Samedi
Samstag
Saturday
Sobota
Sábado
Sábado
Zaterdag
Суббота
السبت
土曜日
星期六
Sunday
Dimanche
Domenica
Domingo
Domingo
Niedziela
Sonntag
Sunday
Zondag
Воскресенье
الأحد (يوم)
日曜日
星期日
Thursday
Czwartek
Donderdag
Donnerstag
Giovedì
Jeudi
Jueves
Quinta-feira
Thursday
Четверг
الخميس
星期四
木曜日
Tuesday
Dienstag
Dinsdag
Mardi
Martedì
Martes
Terça-feira
Tuesday
Wtorek
Вторник
الثلاثاء
星期二
火曜日
Wednesday
Mercoledì
Mercredi
Mittwoch
Miércoles
Quarta-feira
Wednesday
Woensdag
Środa
Среда
الأربعاء
星期三
水曜日
1
0
0
0
0
0
0
Day (unit of temporal duration)
Tag
dag
day
dia
doba
día
giorno
jour
يوماً ما
ある日
一天
언젠가
0
1
0
0
0
0
0
Hour (unit of temporal duration)
Stunde
godzina
heure
hora
hora
hour
ora
uur
ساعة واحدة
一小時
一時間
한 시간
один час"@ru
0
0
1
0
0
0
0
Minute (unit of temporal duration)
Minute
minuta
minute
minute
minuto
minuto
minuto
minuut
одна минута
دقيقة واحدة
一分
等一下
분
0
0
0
1
0
0
0
Month (unit of temporal duration)
maand
mes
mese
miesiąc
mois
monat
month
один месяц
شهر واحد
一か月
一個月
한달
0
0
0
0
1
0
0
Second (unit of temporal duration)
Sekunde
Sekundę
second
seconde
seconde
secondo
segundo
segundo
ثانية واحدة
一秒
一秒
일초
0
0
0
0
0
1
0
Week (unit of temporal duration)
Woche
semaine
semana
semana
settimana
tydzień
week
week
одна неделя
سبوع واحد
一周
一週間
일주일
0
0
0
0
0
0
1
Year (unit of temporal duration)
1 년
1年
Jahr
Rok
an
anno
ano
jaar
un año
year
один год
سنة واحدة
一年
---(0[1-9]|[1-9][0-9])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?
-?([1-9][0-9]{3,}|0[0-9]{3})(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?
--(0[1-9]|1[0-9]|20)(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?
Year number - formulated as a text string with a pattern constraint to reproduce the same lexical form as gYear, but not restricted to values from the Gregorian calendar.
Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.
Generalized year
Year number - generalization of xsd:gYear, formulated as a text string with a pattern constraint to reproduce the same lexical form as gYear. Note that the value-space is not defined, so a generic OWL2 processor cannot compute ordering relationships of values of this type.