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UML Associations

UML Associations

(OP)
Hello anyone,

Could someone please clarify this for me:

On page 6 of the UML Infrastructure v2.2 documentation is stated: An association with neither end marked by navigability arrows means that: the association is navigable in both directions.

But on Page 85 of the UML Superstructure v2.0 in Figure 33:  The third pair EF shows a binary association with unspecified navigability.

Since 'Both' is not semantically the same as 'Unspecified'- which is true?

I'm preparing for the exam and this could easily be posed as a question which I would hate to get wrong. In the exam, semantics is everything!

Thank you for your time
  

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