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Chapter 2 Building an Object-Oriented Model
51
Multiplicity
The cardinality of each of an attribute is called the multiplicity.
Cardinality
Number of instances in relation
0..0
None
0..1
None or one
0..*
None to infinity
1..1
One to one
1..*
One to infinity
*
Infinity
You can change the default format of cardinalities from the registry:
HKEY_CURRENT_USER\Software\Sybase\PowerDesigner
7\ModelOptions\Cld
MultiplicityNotation = 1 (0..1) or 2 (0,1)
Creating an attribute
There are three ways to create an attribute:
♦
Create an attribute symbol in the Browser
♦
Add a new attribute to the list of attributes
♦
Create an attribute from a class in a diagram
Creating an attribute from the Browser
v
To create an attribute from the Browser:
1
Right-click the Attributes category in the Browser.
2
Select New from the contextual menu.
Summary of Contents for Powerdesigner 7.5
Page 1: ...OBJECT ORIENTED MODEL User s Guide POWERDESIGNER 7 5...
Page 8: ...viii...
Page 22: ...Defining OOM properties 12...
Page 144: ...Defining check parameters 134...
Page 208: ...Generating for XML 198 6 Click OK An XML file is generated with the file extension xml...
Page 210: ...Customizing scripts 200...
Page 224: ...Generating a CDM from an OOM 214...
Page 238: ...Generating a PDM from an OOM 228...
Page 260: ...Object language editor categories 250...
Page 268: ...Applying business rules to objects 258...
Page 288: ...278...