Enhanced Entity Relationship (EER) Model is a high-level data model which provides extensions to original Entity Relationship (ER) model. EER Models supports more details design. EER Modeling emerged as a solution for modeling highly complex databases.
EER uses UML notation. UML is the acronym for Unified Modeling Language; it is a general-purpose modeling language used when designing object-oriented systems. Entities are represented as class diagrams. Relationships are represented as associations between entities. The diagram shown below illustrates an ER diagram using the UML notation.