Cade Class Diagram why lineitem and product is 1 to 1

[Ajay Prakash Shukla]

Hi,

I was going through the class diagram in the cade's book, Cade has shown a relationship of 1 to 1 between LineItem and Product. I think the relation should have been many to 1 from LineItem to Product. The reasoning i can say is that same Product can be found in lineitems which are for different Order.
Whats the reasoning here for 1 to 1 ?

Thanks
Ajay

[Jose Latrefoliere]

I had the same problem

https://coderanch.com/t/153554/java-Architect-SCEA/certification/Cade-class-diagram

Jose

[Ajay Prakash Shukla]

Hi,
I looked at the thread you mentioned, that means we need to draw the class diagram in particular context of customer and itinerary and that would end up having 1 to 1 relationship between flight and segment. But this thing just doesnt make sense, like do we have to mention in the document that the class diagram has been drawn within the context of a customer and itinerary.

Thanks
Ajay

[Albert Maurucier]

The analyst has translated the constraint: "an Itinerary can't contain more than one reservation by flight"

Regards

Jose