Enhance Entity Relationship And ER To Relational Mapping (DBMS)

 Enhance Entity Relationship (EER) Model -

EER model is basically the enhanced version of E-R model which includes all the basic concepts of E-R model with capability to support additional semantic concepts of complex applications. these additional concepts are :

1. Specialization 
2. Generalization 
3. Categorization

Note :  For specialization and Generalization Kindly see unit second

Categorization 

Categorization is a modeling process of a single subclass having relationship with more than distinct superclass is known as category and the process of defining a category is known as categorization. the symbol shown in figure (a) represents categorization. consider figure (b).