A relationship between an activity and a input-constraint whereby the constraint needs to be satified in order for the activity to start.
(Inherited-Facet-Value Minimum-Slot-Cardinality
Epml-Activity
Epml-Specified-Pre-Condition
0)
(Inherited-Facet-Value Slot-Value-Type
Epml-Activity
Epml-Specified-Pre-Condition
Epml-Pre-Condition)