# Direction of associations in class diagram

Hey,

i have two classes which are connected with a bidirectional association. If I make only one end navigable VP-UML shows me an arrow. But how can i show arrows on both sides if i have a bidrecional association? I think if there are no arrows it is not clear if it is unspecified or bidrectional.

Thanks for help.

hi hcalex,

The ends of an association are by default navigable. Though we sometimes have non-navigable end, it is relatively uncommon to be unspecified. Therefore, you can treat the ends to be true, by default. We do not mark as arrow end as this will make the diagram look very complex.

Best regards,
Jick