Use case diagram -usage of "includes"

Question

consider the follwing use case diagram
(say the user login to a system, fills a form and submits to the server)

   (Fill in Form) --<<includes>>---->(Login)
            ^
            \                         ^
          <<includes>>               /
              \                     / 
            (sumbit)------<<includes>>     <------- Is this include necassary ?

now "Submit" includes "Login"
again "Submit" includes "Fill in Form" which includes "Login"

The two 'includes' seem unnecassary.
By including "Fill in Form" it automatically includes "Login" or not? What is correct?

seems I can't attach the image.used Ascii :( – Dinushan Jul 19 '12 at 10:04 — Dinushan, Jul 19 '12 at 10:04

score 0 · Answer 1 · answered Oct 19 '12 at 14:09

I dont know about your UML but in this scenario user 1st login with authentication like

User-----> enter Login details-----> press submit button-----> if authenticate-----> fill form----> press submit button---->

In case user is not authenticate system will show error message.

Use case diagram -usage of "includes"

1 Answers1