Full list of glossary terms:

• Action — Code that is executed as the state machine performs transitions
• Activity — A long running process that is usually tied to the state machine being in a state
• And state — A state whose substates are all active, i.e. a AND b AND c, known as a parallel state
• Atomic state — a state that has no substates
• Automatic transition — a transition that happens immediately upon entering a state or immediately after a condition arises
• Choice state — A form of condition state, which in UML, has specific semantics with regards to condition execution
• Composite state — In UML, the term composite state is used for Compound State.
• Compound state — A state that has one or more substates
• Condition — A boolean expression enabling or disabling a transition, known as a Guard.
• Condition state — A pseudo-state that only has transitions, guarded in such a way that it immediately moves to another state.
• Default state — A synonym for Initial state, the substate that a compound state enters by default
• Delayed event — an event that is raised some time after a transition takes place.
• Delayed transition — a transition that executes automatically when a machine has been in a state for a particular amount of time
• Enter — A state becomes an active state in a running state machine
• Event — A trigger for a transition, typically an signal from the outside world that something has happened
• Eventless transition — Another name for Automatic transition, a transition that is not tied to a particular event
• Exit — A state stops being an active state in a running state machine
• External transition — In SCXML, the term external transition is used for the opposite concept of a local transition
• Final state — a helper state which designates that its parent state has completed
• Generated event — An event generated by the statechart itself
• Guard — A boolean check imposed on a transition to inhibit the execution of the transition
• History state — A pseudo-state that remembers the most recent sibling states that were active
• Initial state — The state which is entered when a state machine starts, or when a compound state is entered.
• Internal event — An event caused by the statechart itself, and processed immediately
• Internal transition — In SCXML, the term internal transition is used for the concepts of local transitions
• Junction state — A form of condition state, which in UML, has specific semantics with regards to condition execution
• Local transition — A transition between a state and its children that skips exiting or entering the state in question
• Or state — A state where only one substate is active at a time, i.e. a OR b OR c, known as a compound state
• Orthogonal state — Another name for parallel state
• Parallel State — a compound state that divides its substates into separate state machines that all get to be active at the same time
• Pseudostate — A set of types of state that are transient in nature.
• Raised event — An event generated explicitly by the statechart
• Refine — The conversion of an atomic state to a compound state by the addition of substates.
• Self transition — A transition from a state back to itself.
• Simple state — A synonym for Atomic state, a state that has no substates
• Specialise — Another term for refine, the introduction substates to modify the behaviour of a state
• Start state — A synonym for Initial state, the state that a machine state enters when it starts
• State — A particular behaviour of a state machine
• Transient state — A synonym for Pseudostate, a type of state that are transient in nature.
• Transition — The instantaneous transfer from one state to another.