| Name | Type | Description | Required | 
|---|
| Action | String | The action to which the Custom element applies. | Yes | 
| After | String | The name of the standard or custom action after which this action should be performed. Mutually exclusive with Before, OnExit, and Sequence attributes |   | 
| Before | String | The name of the standard or custom action before which this action should be performed. Mutually exclusive with OnExit, After, and Sequence attributes |   | 
| OnExit | ExitType | Mutually exclusive with Before, After, and Sequence attributes |   | 
| Overridable | YesNoType |                                  If "yes", the sequencing of this action may be overridden by sequencing elsewhere.                              |   | 
| Sequence | Integer | The sequence number for this action. Mutually exclusive with Before, After, and OnExit attributes |   |