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I am drawing a schema to represent the relation among my objects… For instance, the following schema shows that an object A is a pair of an object B and an object C.
Now I want to represent an object D, which is a list of A, I just don’t know how to draw the arrow between A and D…
Could anyone help?
Since it is a 1 to N relation, write a line from D to A with an aggregation or composition symbol (open/closed diamond symbol).
Write at the A side * (meaning 0..n) or 1..n if there needs to be at least one element in the list.
See http://www.ibm.com/developerworks/rational/library/content/RationalEdge/nov03/t_modelinguml_db.pdf for an example, search for the Flight and Plane class diagram about halfway the document.