Usecase problems... include or extend

[MrNorth]

I ahve a small issue when Im designing my use case diagram

I have one use case called "View Message", buth actors can view messages


Then I have another use case "view message details", and only one of the actors can do this.

And another use case which is "administrate message"(delete, update, create), which olso only one actor can do...


what is the relationship between these three use cases? Do they extend or include???


kind regards
Henrik

[MrNorth]

Please, doesn't anyone use the UML use cases when you design your software, or is my question too stupid that it doesn't deserve an answer?


kind regards
Henrik

[Sgt-Peppa]

No its not, i never quite understood the difference between extend and include in UML. Always get them mixed up.
Just glad I dont have to use it at the moment.

Sorry, cant help you.

Stephan

[MrNorth]

Anyway, I tutored myself in the fine art of designing use cases and I think I have found a solution:

View message details --extends--> View message

Administrate message --uses--> view message



IS THIS CORRECT?????


kind regards
Henrik