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Jens Ingels
Jens Ingels

Reputation: 816

Difference between the Domain Model & Activity Diagram

So I'm currently studying UML and I have a question regarding the difference between a Domain Model how this is compared with an Activity Diagram. I a bit confused with the following terms:

In Visual Paradigm, you have two the option between Activity & Class Diagrams to draw out your designs. So far I have been using Class Diagrams for my Domain Model but a friend of mine told me you should not be using Class Diagrams for your Domain Model. So my question what's the difference and how does a program like Visual Paradigm differentials with the standards of the subject I'm trying to learn.

Upvotes: 0

Views: 1339

Answers (2)

Ivan M
Ivan M

Reputation: 1

Activity diagrams are used for represent the behavior which shows flow of control or object flow with emphasis on the sequence and conditions of the flow.

Example: activity diagram

The class diagram is used to specify the relations that exist between the classes from your model, also you can represent their attributes and methods.

Example: class diagram

Going back to your question, if you want to represent the behavior of your model, I should recommend using an activity diagram, but if you only want to specify classes that you want to use and their relation then you can use a class diagram. 

Upvotes: 0

bruno
bruno

Reputation: 32596

Domain model and domain diagram do not exist in UML, so all depends on the definition you use.

If I look at the literature it seems the 'standard' diagram to show a domain model is a class diagram, may be associated with object diagram to show example of instances.

An activity is a behavior, to use common word an 'algorithm'. An activity can be used to model the body of an operation. The goal of an activity and a class are totally different, one cannot replace the other.

Even the definition in Wikipedia is a domain model is a conceptual model of the domain that incorporates both behaviour and data the associated diagram in the article is a class diagram. In the article the word behaviour visibly refer to the rules the business uses in relation to that data.

Anyway, whatever, all depends on what you have to model, there is no definitive rules saying in case 1 use only class diagram, in case 2 use only activity diagram, and so on. You use all the diagrams you want while they are adapted for to say something useful

Upvotes: 1

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