Info

Code
E52
Name
Time-Span

Super

CodeName
E1CRM Entity

Domain for

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

Range for

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