REL   = Release
     HOLD  = On hold until yyyy-mm-dd
     HPUB  = On hold until publication
     OBS   = Entry has been obsoleted
     WDRN  = Entry has been withdrawn by depositor
      | Allowed Value | Details | 
|---|---|
| HOLD | On hold until yyyy-mm-dd | 
| HPUB | On hold until publication | 
| OBS | Entry has been obsoleted | 
| REFI | Re-refined entry | 
| REL | Release | 
| WDRN | Entry has been withdrawn | 
| Allowed Value | Details | 
|---|---|
| HOLD | |
| HPUB | |
| REL |