Definition from IAI:An IfcActionTimeConstraint defines a time
constraint that can be applied to an object. The time that applies to the
constraint is further qualified by the constraint type. The following standard
types are forseen (and string values of the ConstraintType
attribute:
- AsSoonAsPossible
- MustStartOn
- MustStartBefore
- MustNotStartBefore
- MayStartAfter
- MustFinishOn
- MustFinishBefore
- MustMoveOutBy
- MustMoveInBy
ISSUES: See issue and
change log for changes made in IFC 2x.
HISTORY: New Entity in IFC Release
2.0
Multiple constraints may be applied to a task with each constraint
having a description (selected from a range of available descriptions such as
‘as soon as possible’, ‘not start before’, ‘must start
on’, ‘must finish on’, must start before’, ‘must
finish before’, ‘may start after’, ‘must move out by’,
etc.) and a date/time.
