| Object | Darcs.Patch.Prim.V3.ObjectMap, Darcs.Patch.Prim.V3.Core |
| ObjectMap | |
| 1 (Type/Class) | Darcs.Patch.Prim.V3.ObjectMap, Darcs.Patch.Prim.V3.Apply |
| 2 (Data Constructor) | Darcs.Patch.Prim.V3.ObjectMap, Darcs.Patch.Prim.V3.Apply |
| obliterate | Darcs.Commands.Unrecord |
| Okay | Darcs.Patch.Conflict |
| okayHash | Darcs.Repository.Cache |
| OldFormat | Darcs.Patch.Format |
| oldRepoFailMsg | Darcs.Repository.Old |
| OnePatch | Darcs.Flags, Darcs.Arguments |
| OnePattern | Darcs.Flags, Darcs.Arguments |
| OneTag | Darcs.Flags, Darcs.Arguments |
| OnlyChangesToFiles | Darcs.Flags, Darcs.Arguments |
| onlyToFiles | Darcs.Arguments |
| OperationTimeout | URL.Request, URL |
| optimize | Darcs.Commands.Optimize |
| OptimizeHTTP | Darcs.Flags, Darcs.Arguments |
| optimizeHTTP | Darcs.Arguments |
| optimizeInventory | Darcs.Repository.Internal, Darcs.Repository |
| optimizePatchset | Darcs.Patch.Depends |
| OptimizePristine | Darcs.Flags, Darcs.Arguments |
| optimizePristine | Darcs.Arguments |
| option | Darcs.Patch.ReadMonads |
| optionFromDarcsOption | Darcs.Arguments |
| optionsLatex | Darcs.Arguments |
| orClauses | English |
| Origin | Darcs.Patch.Set |
| ortryrunning | Darcs.Utils |
| Output | Darcs.Flags, Darcs.Arguments |
| output | Darcs.Arguments |
| OutputAutoName | Darcs.Flags, Darcs.Arguments |
| outputAutoName | Darcs.Arguments |
| ownName | Darcs.Patch.FileName |