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There are 3 types of workflows in WWF: Sequential Workflow:The sequential workflow style executes a set of contained activities in order, one by one and does not provide an option to go back to any step. State Machine Workflow:It represents the workflow in the form of a state machine containing set of states, each of them receiving events. These events lead to transition from one state to another one. Rules-driven Workflow:It is based on Sequential/StateMachine workflow.