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In the UML model itself we could
use an activity, a state machine, or an interaction to describe the implementation.
Parameters are denoted similarly to attributes. Several parameters are separated
by commas.
 name  :  Type  [  multiplicity  ]
Similarly to an attribute, an operation has a visibility with the same meaning.
All operations are public in SysML models. The visibility is not shown in the notation.
The syntax of an operation is as follows:
 visibility   name  (  parameter list  ):  Return type 
154 CHAPTER 3 UML??”Unifi ed Modeling Language
class Classes Customer, Usage right
Customer
Usage right
name
ID
isBlocked
pinCheckCode
routes
period
isAuthorized
isEmergency
booker right
0..1 1 has
FIGURE 3-11
Example for an association.
5 We can actually model an association between more than two classes, but it is not customary in
practice and not supported by SysML.
6 Actually, this is a common but simplifi ed view of an association. For details see [61].
3.3.4 Association
Defi nition
An association is a structure relationship between two classes .


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