Hi,
I’m working with UML for a few weeks now. I created a very simple sequence diagram (a basic flow).
I don’t know how to model my alternative flow. How far do I go with this?
For my sales screen there are several values which need to be validated. Like: is this the right customerID, is this address correct, is this contact person correct, etc.
Can any body help me to create an alternative flow with all kinds of validations, please? 
mySD.JPG
