问题
I need to make these three UML diagrams for a class project, but they all seem like the exact same thing, a class diagram.
回答1:
The difference is the level of abstraction those models deal with the reality they try to reflect. The conceptual model is just a rough draft of the domain. You try to gather business objects (contents and relations). The application class model is one that is designed towards coding the system under consideration (SUC). The term "consolidated class model" is not a common term (at least I don't know it). But it sounds like it is the final stage of the design and matches exactly one implementation of the SUC.
回答2:
Bellow a simple example of what could be the difference between a conceptual and an implementation model.
Conceptual VS Implementation model
For my own experience conceptual models are much more useful than implementation models. Implementation models are much more longer to do and are only a visualization of the source code. Conceptual models should help you to better analyze, understand and communicate about the system. A good programmer should be able to implement directly the conceptual model into source code.
来源：https://stackoverflow.com/questions/36139846/what-is-the-difference-between-conceptual-domain-models-application-class-model