| Name | Description | Type | Additional information | 
|---|---|---|---|
| Action | 
                         The action which led to the change occurring. Can be one of the following: Create | CreateInHeld | ModifyRenew | MarkAsError | Hold | Resume | Discontinue | SystemDeActivate | Reschedule | PharmacyReview. Approved/declined/reassigned order actions have "Approve" "Decline" or "Reassign" displayed before the enum. (For example: "Decline Create" or "Reassign Hold" or "Approve Discontinue").  | 
                    string | 
                             None.  | 
                
| Field | 
                         The MetaVision field name.  | 
                    string | 
                             None.  | 
                
| NewValue | 
                         The new value within the specified field. Empty value has meaning.  | 
                    string | 
                             None.  | 
                
| PreviousValue | 
                         he previous value within the specified field. Empty value has meaning.  | 
                    string | 
                             None.  | 
                
| Time | 
                         The action entry time.  | 
                    date | 
                             None.  | 
                
| IssuedBy | 
                         The entering user.  | 
                    string | 
                             None.  |