Robustness Diagrams modeling collections

[IronMan1492]

Let's say I have a "Contact" object.  And for discussion purposes, my robustness diagram has the actor, interface (a web page), a controller (Loads Contacs) and the entity (Contact).  In my domain, the contact is a person with name, phone number attributes.

My question now is that my web page needs to load a COLLECTION of contact objects.  So what's the proper way to model this in the robustness (and then sequence) diagrams?  would I create a ContactCollection object that is an aggregation of Contact objects?  Or is there a recommended approach that is more in-line with UML and/or robustness analysis?

thanks!

[jeshaw2]

I like your approach with a collection object.
Jim