Reclassify Junction as a form of Relationship

The metamodel currently has 3 classes of Concept: Element, Relationship, Relationship Connector. However 'architecture description' is usually considered to be simply Elements and Relationships (e.g. ISO 42010).

Essentially a Junction is a relationship between relationships of the same type. The word 'connector' indicates a form of relationship. Eliminating a 3rd class of concept would simplify the metamodel, with Junctions becoming another class of the 'Other' Relationship Category.

Currently if 2 Elements connected by Relationships including a Junction are dropped into a View, the Relationships wont appear. The Junction has to be located and dragged into the View too. This inconvenience would be avoided if a Junction was a type of Relationship.