Do we need StartTime and Endtime?

[micheldumontier]

The original idea for StartTime and Endtime was to be able to annotate specific instants as playing particular roles in some timeline. That a process might have a start time and an end time.

However, it is possible to encode data restrictions on literals in OWL

https://www.w3.org/TR/owl2-syntax/#Datatype_Restrictions

such that data ranges can be specified - thereby eliminating the need to describe the time instant parts of a time interval.

DatatypeRestriction( xsd:dateTime xsd:minInclusive "2024-01-01T00:00:00Z"^^xsd:dateTime xxsd:maxExclusive "2025-01-01T00:00:00Z"^^xsd:dateTime)

[micheldumontier]

however, we might want to do SPARQL queries, and in that case I don't know if SPARQL engines will parse the RDF literal representation of the data restriction...