47
2.2.4.1 Concept of Entity Relationship Modeling
2.2.4.1.1 Entity Types
Entity types
According to
Thomas Connolly & Carolyn
Begg
9
, entity
type
is a group of objects with same properties identified by
enterprise as having an independent existence. The figure
below is the example of entities with a physical or conceptual
existence:
Figure 2. 4 ERD
of Staff and Branch entity
Types (Connolly & Begg, 2004, pg.345)
9
Thomas Connoly, Carolyn Begg (2005).
Database Systems: A Practical Approach to Design,
Implementation,
and Management. 4th ed.England:Addison
Wesley. p343 .
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