| Attribute | Schema Datatype or Enumeration | Usage | Definition | Business Rules |
|---|
| OID | oid | Required | Unique identifier for the StudyObjective element. | The OID attribute value must be unique within the Study/MetaDataVersion. |
| Name | name | Required | Name of the study objective | The Name attribute must be unique within the StudyObjectives elements within a Study/MetadataVersion. |
| Type | (Primary, Secondary) | Required | Whether the objective is a primary or secondary objective | The study protocol document usually specifies the planned set of primary and secondary study objectives. |