UMLR — Attachment point of connectors not specified

There does not seem to be any kind of specification where exactly a connector should end. I.e. on the border of an element, some way inside the element or a bit way off. Obviously the specification itself attaches all connectors exactly on the border of elements. This should be rectified.

In a tool like Enterprise Architect that's true for most of the cases. However, for rounded elements EA still uses a rectangular frame where connectors attach so for UseCase bubbles connectors can end a bit offset. Further they have a special feature to link attributes which intrudes the connector with a small open rectangle into the element.