| Name | Description | |
|---|---|---|
 | CurrentRead | The current value of the Variable may be read. |
| CurrentReadOrWrite | The current value of the Variable may be read or written. |
| CurrentWrite | The current value of the Variable may be written. |
| HistoryRead | The history for the Variable may be read. |
| HistoryReadOrWrite | The history value of the Variable may be read or updated. |
| HistoryWrite | The history for the Variable may be updated. |
| None | The Variable value cannot be accessed and has no event history. |
| SemanticChange | Indicates if the Variable generates SemanticChangeEvents when its value changes. |
| StatusWrite | Indicates if the current StatusCode of the value is writable. |
| TimestampWrite | Indicates if the current SourceTimestamp is writable. |