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Relationship is an abstract concept that specifies some kind of relationship between elements.
Element (from Kernel ) on page 63
A relationship references one or more related elements. Relationship is an abstract metaclass.
No additional attributes
• / relatedElement: Element [1..*] Specifies the elements related by the Relationship. This is a derived union.
No additional constraints
Relationship has no specific semantics. The various subclasses of Relationship will add semantics appropriate to the concept
There is no general notation for a Relationship. The specific subclasses of Relationship will define their own notation. In
most cases the notation is a variation on a line drawn between the related elements.