| A | B |
|---|
| exhaustive | Treating all parts or aspects without omission. |
| supertype | A means of classifying an entity that has subtypes. |
| structural business rule | A structural business rule indicates the types of information to be stored and how the information elements interrelate. |
| business rule | A formalized statement of the usual, customary, or generalized course of action or behavior for a business. |
| Conventions (as related to ERDs) | A practice or procedure widely observed in a group, especially to facilitate communication or social interaction. The common ways used to draw ERDs. |
| subtype / subentity | Something an entity may be split into based on common attributes and/or relationships. |
| mutually exclusive | A relationship that presents choices which are unable to be true at the same time. |
| revenue | That which returns or comes back from an investment. |
| procedural business rule | A business rule that is workflow or business process related. (e.g., A has to happen before B, and then C has to happen at the same time as D.) This is also called a process business rule. |
| source document | Printed material that can be used by analysts to determine information requirements. |
| reserved words | Words that have a special meaning and function within a computer system or language. They should not be used for entity and attribute names. |
