action box
Area visible in the upper left column. You have a list of available actions on the entity. The most frequently used entry is modify.
All element created in the application Example: project, ticket, user, ...
relation editing module
HTML widget that let you define new relations amongst objects.
It's a kind of 'smart' link between 2 objets of the application. It has a specific sense that determine dynamic behaviour and add a new logic of the content.