Objects and Classes - Assigning Value - Expressions
3 important questions on Objects and Classes - Assigning Value - Expressions
You can use a literal or an indirect literal via an instance specification to assign a value to a property or slot as we have seen, but you can also use an OPAQUE EXPRESSION.
Wht is an Opaque Expression?
If necessary, you can specify the target language by preceding the opaque expression string with the language name displayed in.....?
In UML, most : ................. Are written as opaque expressions
- guard conditions
- descriptions of behavior
- and pseudocode
are written as opaque expressions.
As opaque expressions are not automatically parsed, constraints in UML are not always strictly in Boolean form as shown in Fig. 6.7
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