UML Aggregation with and without arrow head
I always thought that the UML aggregate is defined as a black (filled) diamond at the beginning of a path and no arrow head that the end: |--------| |--------| | :MyA |<>------| :MyB | |--------| |--------| Today I came across a notation like <>-----> (with an explicit arrow head on the right end). So I looked it up in the UML 2.4 specification and actually found references for both versions. My favourite reference: "UML and Patterns" by Craig Larman only mentions the first version without the arrow. In the UML specification I found a notice about navigable ends , but I am not sure if this is