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Chapter 5 (Attibute (Properties of Entity/Object (Quantify, Qualify,…
Chapter 5
Attibute
Entity
Mandatory
(m)
Optional
(o)
Object
Attribute multiplictiy
0..1
0..*
1:1
Single noun
No Abbreviations
Properties of Entity/Object
Quantify
Qualify
Identify
Classify
Rules
8 more analysis required
Single Valued
True Attribute not related to another
Unique Identifier
Simple ID
Single Attribute
Unique value to type
notation (#)
Compound ID
Combined Attributes
Both parts unique
notation (#)
(#) Attribute 1
(#) Attribute 2
Surrogate ID
no unique values
Must create a unique id
Employee #
Hierarchic ID
Combined ID
Entity Attribute
Inherit ID attribute
Add Bar ( | ) to relationship
Operations
state
behaviour
Values
Write
set
Set address
Read
get
get address
assocaitions
Class Model Notation
Primitive Data Type
String
Name
Integer
Tel No
Date
DOB
Structured Data type
Defined Data
Address
Enumerated Domain
List of Values
Salutation
Dr
Mrs
Miss
Mr
Domain
Enumerated
Static List
Non enumerated
Dynamic