| Lvl | Code | Display | Definition | 
| 1 | 
named-event  | 
Named Event | 
The trigger occurs in response to a specific named event, and no other information about the trigger is specified. Named events are completely pre-coordinated, and the formal semantics of the trigger are not provided. | 
| 1 | 
periodic  | 
Periodic | 
The trigger occurs at a specific time or periodically as described by a timing or schedule. A periodic event cannot have any data elements, but may have a name assigned as a shorthand for the event. | 
| 1 | 
data-changed  | 
Data Changed | 
The trigger occurs whenever data of a particular type is changed in any way, either added, modified, or removed. | 
| 2 | 
  data-added  | 
Data Added | 
The trigger occurs whenever data of a particular type is added. | 
| 2 | 
  data-modified  | 
Data Updated | 
The trigger occurs whenever data of a particular type is modified. | 
| 2 | 
  data-removed  | 
Data Removed | 
The trigger occurs whenever data of a particular type is removed. | 
| 1 | 
data-accessed  | 
Data Accessed | 
The trigger occurs whenever data of a particular type is accessed. | 
| 1 | 
data-access-ended  | 
Data Access Ended | 
The trigger occurs whenever access to data of a particular type is completed. |