Info

Code
E52
Name
Time-Span

Super

CodeName
E1CRM Entity

Domain for

CodeName
P48has preferred identifier
P3has note
P2has type
P1is identified by
P137exemplifies

Range for

CodeName
P17was motivated by
P136was based on
P39measured
P129is about
P15was influenced by
P71lists
P70documents
P41classified
P140assigned attribute to
P67refers to
P138represents
P141assigned
P62depicts
Description

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. An E52 Time-Span may be identified by one or more instances of E49 Time Appellation. 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 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. Automatic processing and querying of instances of E52 Time-Span is facilitated if data can be parsed into an E61 Time Primitive.