Issue 434: Scope Note of E52 Time Span
Posted by Martin on 8/10/2019
This scope note needs revision in the bold parts, I think:
Subclass of: E1 CRM Entity
Scope note: This class comprises abstract temporal extents, in the sense of Galilean physics, having a beginning, an end and a duration.
Time Span has no other semantic connotations. Time-Spans are used to define the temporal extent of instances of E4 Period, E5 Event and any other phenomena valid for a certain time. [MD1] A Time-Span may be identified by....
Since our knowledge of history is imperfect, instances of E52 Time-Span can best be considered as approximations of the actual Time-Spans of temporal entities. The properties of E52 Time-Span are intended to allow these approximations to be expressed precisely. An extreme case of approximation, might, for example, define an instance of E52 Time-Span having unknown beginning, end and duration. Used as a common E52 Time-Span for two events, it would nevertheless define them as being simultaneous, even if nothing else was known[CSO2] .
Automatic processing and querying of instances of E52 Time-Span is facilitated if data can be parsed into an E61 Time Primitive.
§ From 12-17-1993 to 12-8-1996
§ 14h30 – 16h22 4th July 1945
§ 9.30 am 1.1.1999 to 2.00 pm 1.1.1999
§ duration of the Ming Dynasty (Chan, 2011)
In First Order Logic:
E52(x) ⊃ E1(x)
[MD1]Needs more text…
[CSO2]Should we keep this?