Some uses that I have come across: 1) saving a program’s state data to disk so that it can carry on where it left off when restarted (persistence) 2) sending python data over a TCP connection in a multi-core or distributed system (marshalling) 3) storing python objects in a database 4) converting an arbitrary python … Read more
In most cases, it will only clutter up your diagrams. Login is neither complex (*) nor does it give you much added value as a use case. In your textual document that includes the use cases with description, include as a prerequisite a list of features that require a successful login. Easier to track and … Read more
Extend is used when a use case adds steps to another first-class use case. For example, imagine “Withdraw Cash” is a use case of an Automated Teller Machine (ATM). “Assess Fee” would extend Withdraw Cash and describe the conditional “extension point” that is instantiated when the ATM user doesn’t bank at the ATM’s owning institution. … Read more