| OffsetBy | Database.Persist.Class.PersistEntity, Database.Persist.Types, Database.Persist, Database.Persist.Sql | 
| onlyOneUniqueDef | Database.Persist.Class.PersistUnique, Database.Persist.Class, Database.Persist, Database.Persist.Sql | 
| OnlyOneUniqueKey | Database.Persist.Class.PersistUnique, Database.Persist.Class, Database.Persist, Database.Persist.Sql, Database.Persist.TH | 
| onlyUnique | Database.Persist.Class.PersistUnique, Database.Persist.Class, Database.Persist, Database.Persist.Sql | 
| onlyUniqueP | Database.Persist.Class.PersistUnique, Database.Persist.Class, Database.Persist, Database.Persist.Sql, Database.Persist.TH | 
| orderClause | Database.Persist.Sql | 
| overEntityFields | Database.Persist.EntityDef, Database.Persist.Types, Database.Persist, Database.Persist.Sql | 
| overFieldAttrs | Database.Persist.FieldDef, Database.Persist.Types, Database.Persist, Database.Persist.Sql | 
| OverflowNatural |  | 
| 1 (Type/Class) | Database.Persist.Class.PersistField, Database.Persist.Types, Database.Persist, Database.Persist.Sql | 
| 2 (Data Constructor) | Database.Persist.Class.PersistField, Database.Persist.Types, Database.Persist, Database.Persist.Sql |