The specification of when a State-Of-Affairs must be true in a Planning-Constraint
(Inherited-Facet-Value Slot-Value-Type
Effect
When-Hold
Effect-When-Hold)
(Inherited-Facet-Value Slot-Cardinality Effect When-Hold 1)
(Inherited-Facet-Value Slot-Value-Type
Pre-Condition
When-Hold
Pre-Condition-When-Hold)
(Inherited-Facet-Value Slot-Cardinality Pre-Condition When-Hold 1)
(Inherited-Facet-Value Slot-Value-Type
Planning-Constraint
When-Hold
When-Hold-Spec)