| Name | Description |
| NEW |
 | New | element designed as new addition |
|
| EXISTING |
 | Existing | element exists and is to remain |
|
| DEMOLISH |
 | Demolish | element exists but is to be demolished |
|
| TEMPORARY |
 | Temporary | element will exist only temporarily (such as a temporary support structure) |
|
| OTHER |
 | (other) | Value is not listed. |
|
| NOTKNOWN |
 | (unknown) | Value is unknown. |
|
| UNSET |
 | (unset) | Value has not been specified. |
|