| Attribute | Schema Datatype or Enumeration | Usage | Definition | Business Rules |
|---|---|---|---|---|
| OID | oid | Required | Unique identifier. | Must be unique within the Study. |
| Name | name | Required | Human readable name for the DurationTimingConstraint. | Must be unique within the set of timing constraints for the Study. |
| StructuralElementOID | oidref | Required | OID of a structural element such as a Study, Epoch, StudyEventGroup, StudyEvent, ItemGroup, Item | Must match the OID for Study, Epoch, StudyEventGroupDef, StudyEventDef, ItemGroupDef or ItemDef. element. |
| DurationTarget | durationDatetime | Required | Constrains the duration of an activity represented by a Study, Epoch, StudyEventGroupDef, StudyEventDef, ItemGroupDef or ItemDef. Specifies the planned duration of the referenced structural element. | Must be a non-negative ISO 8601 duration. |
| DurationPreWindow | durationDatetime | Optional | Defines the amount of time by which the targetted duration may be reduced. | Must be a non-negative ISO 8601 duration. |
| DurationPreWindow | durationDatetime | Optional | Defines the amount of time by which the targetted duration may be increased. | Must be a non-negative ISO 8601 duration. |
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