Regard ER model

Faced with the need to make an ER model of the system.
Something I remember from uni, something forgotten, here's a specific question — can't remember the characteristics of some types of communication, written by those that remember and those that don't remember, add plz!

-|--- 1
-|0--- 0...1
E|--- 1...N
Э0--- 0...N
-|-|---?
E---?
October 8th 19 at 02:09
1 answer
October 8th 19 at 02:11
It is unclear what you are asking. Write a new question in the normal way.

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