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.

The day of week

Duration of a temporal extent expressed as a number scaled by a temporal unit

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

Description of date and time structured with separate values for the various elements of a calendar-clock system

Description of temporal extent structured with separate values for the various elements of a calendar-clock system.

A temporal entity with zero extent or duration

A temporal entity with an extent or duration

Note: integer is a specialization of decimal

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.

A temporal interval or instant.

A temporal unit of measure, which provides a scale factor for a time quantity.

A temporal position described using either a (nominal) value from an ordinal reference system, or a (numeric) value in a temporal coordinate system.

Duration year, not a calendar year!

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.

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 day of week, whose value is a member of the class time:DayOfWeek

The number of the day within the year

length of a temporal extent expressed in days

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 - 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.

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.

Beginning of a temporal entity.

Value of DateTimeInterval expressed as a structured value.

Duration of a temporal entity, expressed as a scaled value or nominal value

Duration of a temporal entity, expressed using a structured description

End of a temporal entity.

Supports the inclusion of temporal entities in other resources, such as temporal reference systems.

The temporal reference system used by a temporal position or extent description.

Hour position in a calendar-clock system.

length of a temporal extent expressed in hours

Position of an instant, expressed using a structured description

Position of a time instant expressed as a TimePosition

Position of an instant, expressed using xsd:DateTime

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.

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.

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 the beginning of T2, and the end of T1 is 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 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 the end of T2.

If a proper interval T1 is intervalMeets another proper interval T2, then the end of T1 is the beginning of T2.

If a proper interval T1 is intervalMetBy another proper interval T2, then the beginning of T1 is 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.

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 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 the beginning of T2, and the end of T1 is before the end of T2.

Minute position in a calendar-clock system.

length 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.

length of a temporal extent expressed in months

The (nominal) value indicating temporal position in an ordinal reference system

Value of a temporal extent expressed as a number scaled by a temporal unit

The (numeric) value indicating position within a temporal coordinate system

Second position in a calendar-clock system.

length of a temporal extent expressed in seconds

The time zone for clock elements in the temporal position

The temporal unit which provides the precision of a date-time value or scale of a temporal extent

The number of the week within the year

length of a temporal extent expressed in weeks

Value of DateTimeInterval expressed as a compact value.

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.

length of a temporal extent expressed in years