| Code | Element for the communication of all codes. |
| Description | |
| EffectiveDateTime | This is the DateTime the associated object is made effective |
 Reason | |
| ReasonCode | Identifies the reason for an activity |
| TimePeriod | An explicit period of time for the bucket.Provides the structure to indicate a Date/Time period where the Time is provided with in the Start and Duration or EndDateTime. |
| Type | Indicates the type of the object in which assoicated. |
| UserArea | Allows the user of OAGIS to extend the specification in order to provide additional information that is not captured in OAGIS. |