CIS 4600 Chapter 2 Terms.txt

An entity type that associates the instances of one or more entity types and contains attributes that are peculiar to the relationship between those entity instances

A property or characteristic of an entity or relationship type that is of interest to the organization

A relationship between the instances of two entity types

A statement that defines or constrains some aspect of the business. It is intended to assert business structure or to control or influence the behavior of the business.

A rule that specifies the number off instances of one entity that can (or must) be associated with each instance of another entity.

An attribute that has meaningful component parts (attributes).

An identifier that consists of a composite attribute.

The number off entity types that participate in a relationship.

Ann attribute whose values can be calculated from related attribute values.

A person, a place, an object, an event, or a concept in the user environment about which the organization wishes to maintain data.

A single occurrence of an entity type.

A graphical representation of an entity-relationship model.

A logical representation of the data for an organization or for a business area, using entities for categories of data and relationships for associations between entities.

A collection of entities that share common properties or characteristics.

An association between two or more terms.

An attribute or combination of attributes, whose value distinguishes instances off an entity type.

The entity type on which the weak entity type depends.

The relationship between a weak entity type and its owner.

The maximum number of instances of one entity that may be associated with each instance of another entity.

The minimum number of instances of one entity that may be associated with each instance of another entity.

An attribute that may take on more than one value for a given entity (or relationship) instance.

An attribute that may not have a value for every entity (or relationship) instance with which it is associated.

An association between or among entity instances where each relationship instance associated exactly one entity instance from each participating entity type.

A meaningful association between or among entity types.

An attribute that must have a value for every entity or relationship instance with which it is associated.

An attribute that cannot be broken down into smaller components that are meaningful to the organization.

An entity that exists independently of other entity types.

A word or phrase that has specific meaning to the business.

A simultaneous relationship among the instances of three entity types.

A time value that is associated with a data value, often indicating when some event occurred that affected the data value.

A relationship between instances of a single entity type.

An entity type whose existence depends on some other entity type.