| Name | Type | Package | Detail |
| MiddleDummyComponentMapper | Class | relation.component | Detail |
| MiddleMapKeyIdComponentMapper | Class | relation.component | Detail |
| MiddleMapKeyPropertyComponentMapper | Class | relation.component | Detail |
| MiddleRelatedComponentMapper | Class | relation.component | Detail |
| MiddleSimpleComponentMapper | Class | relation.component | Detail |
| MiddleStraightComponentMapper | Class | relation.component | Detail |
