The use-case tag has no wiki summary.
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Use case notation for login
When a login is needed in a system to perfom any action. How do you express that in a Use Case Diagram?
I have a system that will allow employees to perform sells. They must be logged in, but once ...
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Use Cases with respect to downstream systems
Use cases are primarily meant for interaction between user and a system. It could be used for interaction between system and another system. The actors are primarily roles.
It is easy to document ...
