Concept Synthesis for Data Modeling (Merise)
In HOPEX Logical Data, a data model (Merise) is represented by:
• Entities, which represent the basic concepts (client, account, product, etc.).
• Associations, which define relationships between the different entities.
• Attributes (information or properties), which define the characteristics of entities and in certain cases, associations.
The attribute that enables unique identification of an entity is called an identifier.
The data model is completed by definition of cardinalities.