The initial time of a scenario is a time-quantity.
(Inherited-Facet-Value Slot-Cardinality Scenario Initial-Time 1)
(Inherited-Facet-Value Slot-Value-Type
Scenario
Initial-Time
Time-Quantity)
(=> (Scenario ?S)
(And (Value-Type ?S Initial-Time Time-Quantity)
(Value-Cardinality ?S Initial-Time 1)
(Value-Type ?S Final-Time Time-Quantity)
(Value-Cardinality ?S Final-Time 1)
(Value-Cardinality ?S Scenario.Participants 1)))
(=> (Initial-Time $X $Y) (Time-Quantity $Y))
(=> (Initial-Time $X $Y) (Scenario $X))