  The entity relationship modelling using the original ER notation has been
applauded providing a natural view of data in conceptual modelling of
information systems. However, the current ER to relational model transformation
algorithm is known to be insufficient in providing a complete and accurate
representation of the ER model undertaken for transformation. In an effort to
derive better transformations from ER models, we have understood that
modifications should be introduced to both of the existing transformation
algorithm as well as to the ER notation. Introducing some new concepts, we have
adapted the original ER notation and developed a new transformation algorithm
based on the existing one. This paper presents the modified ER notation with an
ER diagram drawn based on the new notation.
