Systems Analysis & Design In A Changing World - Chapter 5

Front 1

A class that cannot be instantiated (no objects can be created), existing only to allow subclasses to inherit its attributes, methods and associations

Back 1

Abstract Class

Front 2

Behaviour that the system performs when an event occurs (similar to a use case).

Back 2

Activity

Front 3

Whole-part relationships between an object and its parts.

Back 3

Aggregation

Front 4

A class that represents a many-to-many relationship between two other classes

Back 4

Association Class

Front 5

A data entity that represents a many-to-many relationship between two other data entities

Back 5

Associative Entity

Front 6

One piece of specific information about a thing

Back 6

Attribute

Front 7

Relationships between two different types of things, such as a customer and an order

Back 7

Binary Relationships

Front 8

The number of associations that occur among specific things, such as a customer places many orders and an employee works in one department

Back 8

Cardinality

Front 9

A type of classification to which all similar objects belong

Back 9

Class

Front 10

Whole-part relationships in which the parts cannot be dissociated from the object

Back 10

Composition

Front 11

An attribute that contains a collection of related attributes.

Back 11

Compound Attribute

Front 12

A class that can be instantiated (objects can be created)

Back 12

Concrete Class

Front 13

The things the system needs to store information about in the traditional approach to information systems

Back 13

Data Entities

Front 14

Narrative memos, reports, or lists that describe some aspect of a system

Back 14

Descriptive Model

Front 15

An external agent or actor that receives data from the system.

Back 15

Destination

Front 16

A class diagram without methods, which is created as a requirements model

Back 16

Domain Model

Front 17

Covering or protecting each object so that it contains values for attributes and methods for operating on those attributes, making the object a self-contained (and protected) unit

Back 17

Encapsulation

Front 18

An occurrence at a specific time and place that can be described and is worth remembering

Back 18

Event

Front 19

A table that lists events in rows and key pieces of information about each event in columns

Back 19

Event Table

Front 20

An event that occurs outside the system, usually initiated by an external agent or actor

Back 20

External Event

Front 21

Hierarchies that structure or rank classes from the more general super-class to the more specialized sub-classes; sometimes called inheritance hierarchies.

Back 21

Generalization/Specialization Hierarchies

Front 22

Diagrams and schematic representations of some aspect of a system

Back 22

Graphical Model

Front 23

An attribute that uniquely identifies a thing

Back 23

Identifier (key)

Front 24

A concept that allows subclasses to share characteristics of their superclasses

Back 24

Inheritance

Front 25

A series of formulas that describe technical aspects of a system.

Back 25

Mathematical Model

Front 26

The behaviours of all objects of the class are capable of doing.

Back 26

Methods

Front 27

A synonym for cardinality (used with the object-oriented approach).

Back 27

Multiplicity

Front 28

A relationship among n (any number of) different types of things

Back 28

N-ary Relationship

Front 29

The assumption that events should be included during analysis only if the system would be required to respond under perfect conditions.

Back 29

Perfect Technology Assumption

Front 30

A naturally occurring association among specific things, such as an order is placed by a customer and an employee works in a department

Back 30

Relationship

Front 31

An output, produced by the system, that goes to a destination

Back 31

Response

Front 32

An external agent or actor that supplies data to the system.

Back 32

Source

Front 33

An event that occurs when something happens inside the system that triggers the need for processing

Back 33

State Event

Front 34

Checks or safety procedures put in place to protect the integrity of the system

Back 34

System Controls

Front 35

An event that occurs as a result of reaching a point in time.

Back 35

Temporal Event

Front 36

A relationship among three different types of things.

Back 36

Ternary Relationship

Front 37

A signal that tells the system that an event has occurred, either the arrival of data needing processing or a point in time

Back 37

Trigger

Front 38

A relationship among two things of the same type, such as one person being married to another person

Back 38

Unary (Recursive) Relationship

Front 39

A series of actions that a system performs that result in a defined outcome (similar to an activity).

Back 39

Use Case

Front 40

Hierarchies that structure classes according to their associated components.

Back 40

Whole-Part Hierarchies