Where can I find legends about the UML diagram?

Hello,

I am trying to understand the UML diagrams generated by IntellijIDEA, but I couldn't find any IntellijIDEA documentation that explains the UML diagram. I looked into the 'Working with Diagrams' section at the documentation.

Where can I find the legends of the UML diagram in the documentation? For example, what's the difference between relationships presented between blue and green arrow? What's the meaning of <<create>> label of an association. and many more.

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