I am a CS major and just want to say this helped me a bunch thank you. God bless

The explanation is clear and simple to understand. Thank you

Thank you so much the examples are very helpful!!

When is an enum either association, aggregation or composition?

For me a enum is a part of a class in the whole lifespan of the class - hense I would depicture it as Composition. However in your examples on this page you only depict them as associations. I find it very confusing.

How to add operations and attributes to an enumeration? (visible in the diagram not just in the "Element Properties")

For example I want to have a constructor and a private field in the enumeration.