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level: Level 4 - Data Model Building Blocks

Questions and Answers List

Question	Answer
This is a person, place, thing, or event about which data will be collected and stored.	Entity
This is a characteristic of an entity.	Attribute
This describes an association among entities.	Relationship
This is a restriction placed on the data. This is important because they help with data integrity. This is normally expressed in the form of rules.	Constraint
This is a description of a policy, procedure, or principle within an organization.	Business rules