This illustration shows an example of explicit mapping for one-to-many bidirectional relationship. There is a table row on the left labeled "DEPT" with the following column heads: "PK:DEPTNO" and "DNAME". On the right, there is a table row labeled "EMP" with the following columns: "PK:EMPNO", "ENAME", "SAL", and "PK:EDEPTNO". There is an arrow pointing from the "PK:EDEPTNO" column in the "EMP" table to the "PK:DEPTNO" column in the "DEPT" table.