xpms.supersession
TableRow level security on
Superseded codes and their successors. Supersession is data, so reverting is a data change; the graph stays acyclic.
Primary key: domain, code
| Column | Type | Nullable | Description |
|---|---|---|---|
| domain | xpms.canon_code | No | Code domain, such as phase. |
| code | xpms.canon_code | No | Superseded code; historical references keep resolving. |
| successor_code | xpms.canon_code | No | Code that supersedes it. |
| label | xpms.canon_text | No | Label the superseded code carried. |
| reason | xpms.canon_text | No | Why the code was superseded. |