This is second day of Unified Modeling Language.
UML came from 3 notations. They are Booch, OMT, and OOSE. UML is organized by OMG. Unified notation can have us understand what it says. When each people use different notations, we have to explain what the notation means by. With UML, we can avoid reinventation of the cycle.
- An object is an instance of a class.
- use case
- state machine
- interaction overview