Entities
Entity
- Something that can be identified in the users’ environment about which we want to store data; typically is a noun
- Entities or objects must have occurrences that can be uniquely identified
- Identified by an organization or its users
- Consists of tangible or intangible objects or events
Entity Instance
- A single entity occurrence or instance within a collection of entities
e.g., STUDENT is an entity; Annie Abel is an entity instance as are Bob Brown and Cathy Chen.