This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
It is my undersanding that a line between two classes (without an arrow) represents a bi-directional association. Is this correct?
Also, is it possible for an association between two classes to be both associative and compositive? In other words, can Class B be both composed of Class A and have a reference to Class A (meaning it would have a UML symbol of both an open arrow and a solid diamond in the same direction)?