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2016-06-15 - initial update of OWL-Time - modified to support arbitrary temporal reference systems.
2016-12-20 - adjust range of time:timeZone to time:TimeZone, moved up from the tzont ontology.
2016-12-20 - restore time:Year and time:January which were present in the 2006 version of the ontology, but now marked "deprecated".
2017-02 - intervalIn, intervalDisjoint, monthOfYear added; TemporalUnit subclass of TemporalDuration
2017-04-06 - hasTime, hasXSDDuration added; Number removed; all duration elements changed to xsd:decimal
Update of OWL-Time ontology, extended to support general temporal reference systems.
Ontology engineering by Simon J D Cox