UAF13 — UAFML should not redefine SysML method attribute of the Viewpoint Stereotype.

The method redefinition changes the type from SysML Behavior to SysML String, which limits the usefulness of the UAF viewpoint stereotype unnecessarily without providing any benefit. The description of the method attribute is, "The methods employed in the development of the Viewpoint." Redefining this to a string precludes defining executable methods that generate a view from the viewpoint, while leaving it as a behavior would not preclude defining the method as a string, since the body attribute of UML OpaqueBehavior is a string.

Allowing the definition of the method as a behavior would also allow explicitly defining the types of inputs from the model needed to produce the view from the viewpoint as the types of input parameters to the behavior.