- Structures data in an intuitive way.
- Used early in the process of gathering requirements and planning a system.
- Starting point for the logical design of any database
- Does not address how data is accessed or maintained.
A thing that is important for your application.
- A person
- A profile
- A product that can be purchased on an e-commerce website
- A review of that product
- An order containing that product
- The shipment of that product
- A phone call
- The cell phone originating the phone call
Pretty much anything you talk about.