| ActivityID | The activity ID for the current event call. Can be used with event tracking framework. |
| CurrentTransactionID | The current transaction id. Represents either real transaction or enlisting DB transaction. |
| CurrentUserID | The current (author) user id for the current event. |
| CurrentUserSessionInfo | The session info that represents the current (invoker) user session. |
| DisplayID | The handled object or value list item display id. Relevant only for events that handle objects of value list items. |
| MasterTransactionID | The master (real) DB transaction id. |
| ObjVer | Object version identifier for current event. Set if the event is associated with an object version. |
| ParentTransactionID | Parent transaction id. Set with enlisting transaction only. |
| SavepointVariables | |
| TransactionCache | Accessor for the transaction cache. |
| Vault | Current vault object. This vault object is bound with current DB transaction. |
| VaultSharedVariables | Accessor for the shared variabled. |