| Map | Data.Extensible.Internal |
| mapFlux | Data.Extensible.Union, Data.Extensible |
| mapFuse | Data.Extensible.League, Data.Extensible |
| mapMatch | Data.Extensible.Match, Data.Extensible |
| mapNullable | Data.Extensible.Internal.Rig, Data.Extensible.Inclusion, Data.Extensible.Record, Data.Extensible |
| MapSucc | Data.Extensible.Internal |
| Match | |
| 1 (Type/Class) | Data.Extensible.Internal.Rig, Data.Extensible.Match, Data.Extensible |
| 2 (Data Constructor) | Data.Extensible.Internal.Rig, Data.Extensible.Match, Data.Extensible |
| match | Data.Extensible.Match, Data.Extensible |
| meltdown | Data.Extensible.League, Data.Extensible |
| Member | Data.Extensible.Internal, Data.Extensible.Inclusion, Data.Extensible.Record, Data.Extensible |
| Membership | Data.Extensible.Internal, Data.Extensible.Inclusion, Data.Extensible.Record, Data.Extensible |
| membership | Data.Extensible.Internal, Data.Extensible.Inclusion, Data.Extensible.Record, Data.Extensible |
| Merge | Data.Extensible.Internal |
| MergeList | |
| 1 (Type/Class) | Data.Extensible.Internal.Rig |
| 2 (Data Constructor) | Data.Extensible.Internal.Rig |
| Missing | Data.Extensible.Internal, Data.Extensible.Inclusion, Data.Extensible.Record, Data.Extensible |
| mkField | Data.Extensible.Record, Data.Extensible |