How to build Shlaer-Mellor object models /
Starr, Leon
How to build Shlaer-Mellor object models / Leon Starr. - Upper Saddle River, New Jersey: Prentice Hall, 1996 - 289 p. - Yourdon Press Computing Series .
CONTENIDO
BASIC MODEL STRUCTURES
1. Objects 3
Object table rules 5
Object categories 8
Frequently asked questions about objects 19
2. Attributes 23
Purpose 24
Identification role 25
Dependence on other attributes 29
Value assignment 33
Universal meaning 35
Origin 42
Summary of Attribute Properties 43
Frequently asked questions about attributes 44
3. Relationships 47
Relationships define application policies 50
Relationship types 54
Type 1: Binary Relationships 56
Type 2: Associative Relationships 58
Type 3: Supertype Relationships 59
And now for some examples 60
4. Binary relationships 61
Non-reflexive binary relationships 63
Multiplicity 64
One to one 64
One to many 66
Many to many 68
Conditional relationships 69
Reflexive relationships 72
5. Associative relationships 77
Multiplicity on associative relationships 81
Conditionality on associative relationships 85
Frequently asked questions about associative relationships 90
6. Basic supertype relationships 93
What is a supertype relationship? 93
When to use supertype relationships 97
Generalization and specialization 97
Mutual exclusion 102
How supertypes are formalized 106
Which policy should you use? 111
Frequently asked questions about supertype relationships 113
7. Advanced supertype relationships 115
Multi-directional supertyping 115
Multi-level supertyping 125
Overlapping supertypes (selective generalization) 127
The danger of supertype hacking 132
How to organize subtype levels 133
Subtype migration 133
When to subtype an object according to its states 136
Don't overdo the hierarchical thing 137
Sometimes the wrong thing is subtyped 138
Summary 140
How to build useful models
8. How to avoid model hacking 143
9. Why write model descriptions? 153
Five reasons to write model descriptions 154
Summary 163
10. How to write object descriptions 165
Describe meaning-not syntax 165
Use both drawings and text 170
Use terminology appropriate to the problem domain 174
Refer to other model elements in the same problem domain 175
Describe behavior 176
Don't be wishy-washy 178
How long should an object description be? 179
How much explanation is necessary? 179
Summary 180
11. How to write attribute descriptions 181
Descriptive attribute descriptions 182
Descriptive numeric domains 183
Descriptive set attributes 187
Descriptive name attributes 192
Invented identifiers 192
Found identifiers 194
Referential attribute descriptions 195
12. How to write relationship descriptions 199
What can you say about relationships? 199
Don't write the relationship descriptions last! 204
Summary 205
Model patterns
13. Is zero-one-many specific enough? 209
Conclusions 213
14. Reflexive patterns 215
Reflexive relationships and graphs 215
Self-referencing in analysis and programming 218
Implementation mechanisms disguised as application policy 220
Simple and complex graphs 222
15. Network patterns 223
Adjacent territorios 223
Summary-really important staff 236
16. Linear patterns 237
Example 1: Mission editor in a flight Simulator 238
Example 2: Polyline draw tool in an illustration program 254
Summary 260
17. Tree patterns 261
A simple tree 263
A tree with a root 264
A tree with leaves 266
How much modeling is too much? 278
Summary 279
0132076632
OBJECT-ORIENTED PROGRAMMING
SYSTEM ANALYSIS
PROGRAMACION ORIENTADA A OBJETOS
004.415.2.045 ST28
How to build Shlaer-Mellor object models / Leon Starr. - Upper Saddle River, New Jersey: Prentice Hall, 1996 - 289 p. - Yourdon Press Computing Series .
CONTENIDO
BASIC MODEL STRUCTURES
1. Objects 3
Object table rules 5
Object categories 8
Frequently asked questions about objects 19
2. Attributes 23
Purpose 24
Identification role 25
Dependence on other attributes 29
Value assignment 33
Universal meaning 35
Origin 42
Summary of Attribute Properties 43
Frequently asked questions about attributes 44
3. Relationships 47
Relationships define application policies 50
Relationship types 54
Type 1: Binary Relationships 56
Type 2: Associative Relationships 58
Type 3: Supertype Relationships 59
And now for some examples 60
4. Binary relationships 61
Non-reflexive binary relationships 63
Multiplicity 64
One to one 64
One to many 66
Many to many 68
Conditional relationships 69
Reflexive relationships 72
5. Associative relationships 77
Multiplicity on associative relationships 81
Conditionality on associative relationships 85
Frequently asked questions about associative relationships 90
6. Basic supertype relationships 93
What is a supertype relationship? 93
When to use supertype relationships 97
Generalization and specialization 97
Mutual exclusion 102
How supertypes are formalized 106
Which policy should you use? 111
Frequently asked questions about supertype relationships 113
7. Advanced supertype relationships 115
Multi-directional supertyping 115
Multi-level supertyping 125
Overlapping supertypes (selective generalization) 127
The danger of supertype hacking 132
How to organize subtype levels 133
Subtype migration 133
When to subtype an object according to its states 136
Don't overdo the hierarchical thing 137
Sometimes the wrong thing is subtyped 138
Summary 140
How to build useful models
8. How to avoid model hacking 143
9. Why write model descriptions? 153
Five reasons to write model descriptions 154
Summary 163
10. How to write object descriptions 165
Describe meaning-not syntax 165
Use both drawings and text 170
Use terminology appropriate to the problem domain 174
Refer to other model elements in the same problem domain 175
Describe behavior 176
Don't be wishy-washy 178
How long should an object description be? 179
How much explanation is necessary? 179
Summary 180
11. How to write attribute descriptions 181
Descriptive attribute descriptions 182
Descriptive numeric domains 183
Descriptive set attributes 187
Descriptive name attributes 192
Invented identifiers 192
Found identifiers 194
Referential attribute descriptions 195
12. How to write relationship descriptions 199
What can you say about relationships? 199
Don't write the relationship descriptions last! 204
Summary 205
Model patterns
13. Is zero-one-many specific enough? 209
Conclusions 213
14. Reflexive patterns 215
Reflexive relationships and graphs 215
Self-referencing in analysis and programming 218
Implementation mechanisms disguised as application policy 220
Simple and complex graphs 222
15. Network patterns 223
Adjacent territorios 223
Summary-really important staff 236
16. Linear patterns 237
Example 1: Mission editor in a flight Simulator 238
Example 2: Polyline draw tool in an illustration program 254
Summary 260
17. Tree patterns 261
A simple tree 263
A tree with a root 264
A tree with leaves 266
How much modeling is too much? 278
Summary 279
0132076632
OBJECT-ORIENTED PROGRAMMING
SYSTEM ANALYSIS
PROGRAMACION ORIENTADA A OBJETOS
004.415.2.045 ST28