UML class diagram design (classes related to report and standard system classes)

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Posted on by Fares Ben Miled

Hi everyone,
so after finishing my project and getting to draw UML related diagrams, I have a question related to UML class diagram:
I've drawn the classes related to each table I created and the classes I created as an extension of a standard system class, event handlers,...

My questions are:
1) Should I represent the standard system class (HcmWorker, DirPerson,..) that I used their method or have a relation with my table even though I didn't create them/modify/extend them...(if yes: should I present only the methods that I called within that class or present it as a whole with every method and variable) ?

2) While creating my report I used UI builder, controller, contract and DP with a tmp table, should I present all of them and how to while having them interact with my system and omitting the tmp table since it's class only diagram ?

I really appreciate your help.

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nmaenpaa 101,166 Moderator on at

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Hi Fares,

I think it really depends on the requirements of the person / organization who asked you to draw those diagrams.

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Martin Dráb 239,040 Most Valuable Professional on at

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I agree. It all depends on what you want to represent on the diagram. Ask yourself about the purpose of the diagram - who will use, for what purpose and what information is needed for that. For example, listing all methods is rarely useful for anything.

I wouldn't distinguish too much between classes and tables. That it's called Class diagram doesn't mean that you can't use tables there. If you were designing it in C#, for example, all tables would be implemented as classes anyway, because most languages don't have such a distinction.

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Fares Ben Miled 99 on at

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Thanks Nikolaos and Martin for your help as always, it's for my university since the project is part of my internship, and Martin your explanation sounds reasonable to me to follow so thanks for taking the time to write that, I will add everything related to the report as well as adding the standard classes that I worked but only describing what I used from them.

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