I am creating an UML class diagram on Papyrus but I can't understand the notation used for associations. When an association is set to be navigable, the tool adds a black dot on the tip of the arrow as default notation. I was able to remove the dot by changing the member end owner from classifier to association. What is the conceptual difference between the two? I can't find any discussion on the concept of classifier in my UML book...
Thank you!!
PS: I'm using papyrus 4 on Eclipse Juno