| Name | Level | Visibility | Read-Only | Typing | Associated Type | Description | Initial Value |
| ROW_INDEX | Instance Attribute | Private | No | Type | INT4 | Natural number | |
| ROW_HEIGHT | Instance Attribute | Private | No | Type | FLOAT | Field of type FLTP | |
| VISIBLE | Instance Attribute | Private | No | Type | BOOLEAN | Boolean Variable (X=True, -=False, Space=Unknown) | |
| OUTLINE_LEVEL | Instance Attribute | Private | No | Type | INT4 | Natural number | 0 |
| COLLAPSED | Instance Attribute | Private | No | Type | BOOLEAN | Boolean Variable (X=True, -=False, Space=Unknown) | |
| XF_INDEX | Instance Attribute | Private | No | Type | INT4 | Natural number |