3 kind data modeling
conceptual data modeling / OBDM (Object Based Data Model) example of OBDM The main purpose of this model is to construct entities, their attributes, and their relationships. At the data modeling level, almost no detail is available of the actual database structure. The 3 basic elements of this model are Entity: the name of a data set Attributes: characteristics or properties of an entity Relationship: A relation or relationship between two entities As an example: Customers and Products are two entities. The number and name of the customer are attributes of the customer entity Product name and price are attributes of the product entity Sales is the relationship between the customer entity and the product entity Characteristics of this data modeling: offers coverage of business concepts across the organization. This type of data model is designed and developed for users. This model is developed independently of hardware specifications such as data storage capacity, location