IS 410 exam 1 review

Attribute - property or characteristic of an entity type that is of interest Business rules - Statements that define or constrain some aspect of the business logic Completeness Constraint - Determines whether an instance of a supertype must also be a member of at least one subtype Conceptual schema - the view of data architect/administrator Data - stored representations of meaningful objects and events Database - organized collection of logically related data Database Management System - A software system that is used to create, maintain, and provide controlled access to user databases Disjoint rule - An instance of the supertype may not simultaneously be a member of more than one subtype Disjointness Constraint - Determines whether an instance of a supertype may simultaneously be a member of two (or more) subtypes Entity - a person, a place, an object, an event or a concept in the user environment which the organization wishes to maintain data Entity clusters - group one or more entity types and associated relationships into a single abstract entity type ER diagram - a graphical representation of an ER model ER model - detailed logical representation of the data for an organization External schema - The view of end users Fact - a statement about an association between two or more terms Generalization - The process of defining a more general entity type from a set of more specialized entity types. BOTTOM-UP Information - data processed to increase knowledge in the person using the data Internal schema - the underlying design and implementation