This is my very first UML diagram for a Student Record System I have created. I've been reading documentation on the types of relationships such as dependency, Association and Aggregation. Any opinions?
Trying to develop a better understanding of UML diagram relationships
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Here are some, of the top of my head:
Try to arrange it like a tree with dependency arrows going top to bottom. It makes it more readable and allows you to see where improvements can be made.
I think you have mixed up arrow direction. If class A makes calls to class B then class A is dependent on class B and arrow should be pointing from A to B.
If any class is going to keep an instance of another class then you need to use solid lines to indicate that. e.g. Class A has an instance of class B then use a solid line with arrow from A to B.