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A class diagram describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among the classes.

6
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Can a class inherited an implementation of interface ? The interface realization expresses that a class X implements a an interface I. Class X can then, like any other class be specialized further …
answered Dec 10 '17 by Christophe
0
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If your csv file is some kind of output produced by your system, you should not represent it on the class diagram. You could represent classes that are saved in or loaded from the file, or classes …
answered Dec 19 '17 by Christophe
2
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Your UML diagram is ambiguous about the relation between Expense and Category: you use an aggregation, which suggest that there could be several Category instances related to one Expense. But the s …
answered Aug 17 '16 by Christophe
1
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Association can be correct, because aggregation or composition are special kind of associations. Aggregation would be better (i.e. more precise), because it expresses a whole-part relationship. …
answered Jan 27 by Christophe
1
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I won't provide the diagram because this is obviously some kind of homework. But here some hints: The basics Each train class has one and only one DiningCar wagon, at least one FirstClass wag …
answered Nov 13 '17 by Christophe
0
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In short {sequence} means {ordered, nonunique} In long Your question addresses indeed a very subtle difference in the UML semantics associated to multiplicity: ordered means that the objets ar …
answered Mar 5 by Christophe
4
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According to the UML 2.5 specifications: 11.5.3.2: An AssociationClass is a declaration of an Association that has a set of Features of its own. This means that a many-to-many association with …
answered May 20 '17 by Christophe
4
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There is no problem with the Single Responsibility Principle. The SRP doesn't say that the class shall do only one thing. It says that it should have only one reason to change. Some will argue that …
answered Nov 18 '18 by Christophe
7
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The only principle which is not respected here is the Interface Segregation Principle: E-book inherits stock and replenishStock() which are absolutely useless for an electronic book. If you want to …
answered Nov 17 '18 by Christophe
4
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1. How to model a patient ? Your design, with its Account, User, and the different derivates of users are already a good start. The Patient could indeed be a special kind of User. However, the Pa …
answered Apr 29 '17 by Christophe