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4. protected (denoted as #)??”the attribute is visible only to subclasses of the
pertaining class.
Table 3.1 Examples for multiplicities
Multiplicity Meaning
0..1 The value is optional.
1 Exactly one value (default when no
multiplicity is stated).
2..4 At least two values and at most four values.
0..* None to an arbitrary number of values.
* None to an arbitrary number of values
(shortcut notation).
4 Mathematically, a set cannot contain identical elements.
FIGURE 3-9
Example for attributes of the ???customer??? class and a customer object.
class Class Customer and customer object
Customer
-name:String
-ID:String
-isBlocked:Boolean
-pinCheckCode:String
-routes:Route[0..5] {ordered}
name???Gabi Goldfish???
ID2965
isBlockedfalse
pinCheckCode???ddhus???
routes...
pinCheck(pin)
gabi:Customer
153
Altogether, the syntax for attributes is:
 visibility   name  :  Type  [  multiplicity  ]  initial value  {property
string}
Visibilities do not play any role in SysML, where all attributes are public by
defi nition.


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