## Package org.opengis.temporal

Interface Summary
Calendar: A discrete temporal reference system that provides a basis for defining temporal position to a resolution of one day.
CalendarDate: A data type that shall be used to identify temporal position within a calendar.
CalendarEra: Characteristics of each calendar era.
Clock: Provides a basis for defining temporal position within a day.
ClockTime: A data type that shall be used to identify a temporal position within a day.
DateAndTime: Provides a single data type for identifying a temporal position with a resolution of less than a day.
Duration: A data type to be used for describing length or distance in the temporal dimension.
Instant: A zero-dimensional geometric primitive that represents position in time, equivalent to a point in space.
IntervalLength: A data type for intervals of time which supports the expression of duration in terms of a specified multiple of a single unit of time.
JulianDate: The Julian day numbering system is a temporal coordinate system that has its origin at noon on 1 January 4713 BC in the Julian proleptic calendar.
OrdinalEra: Provides a reference to the ordinal era in which the instant occurs.
OrdinalPosition: A data type that shall be used for identifying temporal position within an ordinal temporal reference system.
OrdinalReferenceSystem: Provides only the attributes inherited from temporal reference system.
Period: A one-dimensional geometric primitive that represent extent in time.
PeriodDuration: Uses the format specified by ISO 8601 for exchanging information about the duration of a period.
Position: A union class that consists of one of the data types listed as its attributes.
Separation: Provides operations for calculating temporal length and distance.
TemporalComplex: An aggregation of temporal primitives.
TemporalCoordinate: A data type that shall be used for identifying temporal position within a temporal coordinate system.
TemporalCoordinateSystem: A temporal coordinate system to simplify the computation of temporal distances between points and the functional description of temporal operations.
TemporalEdge: One-dimensional topological primitive in time.
TemporalGeometricPrimitive: An abstract class with two subclasses for representing a temporal instant and a temporal period.
TemporalNode: A zero dimensional topological primitive in time.
TemporalObject: Base interface for temporal object.
TemporalOrder: Provides an operation for determining the position of this temporal primitive relative to another temporal primitive.
TemporalPosition: Used for describing temporal positions referenced to other temporal reference systems.
TemporalPrimitive: An abstract class that represents a non-decomposed element of geometry or topology of time.
TemporalReferenceSystem: Provides information about a temporal reference system.
TemporalTopologicalComplex: An aggregation of connected temporal topological primitives.
TemporalTopologicalPrimitive: Represents a single non-decomposable element of topology and its relationships to other topological primitives within a topological complex.

Class Summary
IndeterminateValue: Provides 4 values for indeterminate positions.
RelativePosition: Values for relative temporal position based on the 13 temporal relationships identified by Allen (1993).

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