问题
I know it is possible to specify the multiplicity within the same class box, without having to draw the link to another class.
My question is, Where should the multiplicity go, after the name or after the type?
Is it:
visibility name multiplicity : type
as
+ clients [0..n] : Client
or
visibility name : type multiplicity
as
+ clients : Client [0..n]
I have two books (Applitying UML and Patterns by Larman and UML and the Unified process by Arlow and Newstadt ) but they differ
回答1:
Pulled from printed page 107 of the UML 2.2 Superstructure OMG Specificiation
Example ...
+createWindow (location: Coordinates, container: Container [0..1]): Window
MORE Examples from the multiplicity element spec, on printed page 97.
Example from Spec on multiplicity.
|--------------------------------------------|
| Customer |
|--------------------------------------------|
| purchase : Purchase [*] {ordered, unique} |
| account: Account [0..5] {unique} |
| |
|--------------------------------------------|
回答2:
UML syntax is a diagrammatic syntax. See this multiplicity example from
http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/
Figure 6: An example of a bi-directional association between a Flight class and a Plane class
----------------- -----------------
| Flight |0..* 0..1 | Plane |
| | ------------------| |
|---------------- -----------------
来源:https://stackoverflow.com/questions/2037757/whats-the-uml-syntax-for-multiplicity-inside-the-class-box