Question: In a use case diagram, when a use case A is connected using an extend relationship with a use case B, the meaning of that

In a use case diagram, when a use case A is

In a use case diagram, when a use case A is connected using an extend" relationship with a use case B, the meaning of that is B behavior is inserted into the behavior of use case B. Like a step in a task A communicates with B A behavior is optional, and it is an increment to the behavior of B A is parent of B

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