Class
is a general template used to define and create specific instances. Every class
contains object used to store the information because of its attributes and
operations/methods.
Object
is an instantiation of a class and every object is with a class. Object is an
essential element which is used capture the information.
State
a set of values that describes an object status at specific intervals of time.
State is represented as rectangle with rounded corners. Arriving, pending,
completed are the examples of state.
Action
is the process that cannot be interrupted and it is associate with the transaction
occurs when the object moves from one state to another state.
Activity
is the process that can be interrupted and it takes long time to complete.
Activities can be started and stopped by using the action.
Behavior
is the process that the object can perform. Sometimes, behaviors are described
by operations.