ISO 10303-214:2010(E)
An Interval_of_time specifies a period of time.
The data associated with an Interval_of_time are the following:
The end_definition defines the end of the Interval_of_time, either by referring to a bound, or specifying the extend of the Interval_of_time by a Duration. If the end_definition refers to an Event_reference or Date_time, this particular bound of the resulting interval is excluded from it.
See interval_of_time to date_time, interval_of_time to duration, and interval_of_time to event_reference for the application assertions.
There shall be exactly one object that defines the end_definition for an Interval_of_time.
The start_definition defines the beginning of the Interval_of_time. The bound specified by the start_definition is included in the resulting interval.
See interval_of_time to date_time and interval_of_time to event_reference for the application assertions.
There shall be exactly one object that defines the start_definition for an Interval_of_time.
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