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Chapter 2 Building an Object-Oriented Model
101
Association role properties
You can define the following properties for each of the two roles of an
association:
♦
Multiplicity
♦
Ordering
♦
Visibility
Multiplicity
The cardinality of each of the two roles of an association is called the
multiplicity. The multiplicity indicates the maximum and minimum number
of values each role can have.
Cardinality
Number of instances
0..0
None
0..1
None or one
0..*
None to infinity
1..1
One to one
1..*
One to infinity
*
Infinity
Ordering
You can define the ends of an association as being ordered or sorted.
Property
Indicates
Sorted
That the set of objects at the end of an association are arranged
according to the way they are defined in the model
Ordered
That the set of objects at the end of an association are arranged
according to in a specific order
Unordered
That the end of the association is neither sorted nor ordered
Содержание Powerdesigner 7.5
Страница 1: ...OBJECT ORIENTED MODEL User s Guide POWERDESIGNER 7 5...
Страница 8: ...viii...
Страница 22: ...Defining OOM properties 12...
Страница 97: ...Chapter 2 Building an Object Oriented Model 87 4 Modify the operation display preferences 5 Click OK...
Страница 144: ...Defining check parameters 134...
Страница 208: ...Generating for XML 198 6 Click OK An XML file is generated with the file extension xml...
Страница 210: ...Customizing scripts 200...
Страница 224: ...Generating a CDM from an OOM 214...
Страница 238: ...Generating a PDM from an OOM 228...
Страница 260: ...Object language editor categories 250...
Страница 268: ...Applying business rules to objects 258...
Страница 288: ...278...