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• Requestor user that request activation
• Approver user that approves or rejects the activation request
• Human Task a step in the flow that requires a user to make a decision
• Script Task a step in the flow that executes java code
• Message a message in the pulse shown under the header 'Work items'
• Notification a banner shown in the UI when a new message has been received

Terms in 4.5

activator instead of requestor
action instead of decision 

Detailed steps in workflow

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