Action Nodes
Action nodes are the building blocks of Actionflows and are represented as a circle with an icon. They perform specific tasks, e.g. decision gateways, performing calculations, and API integrations, and are joined together using connectors.
Action nodes can be dragged from the toolbar onto the canvas to create a new action, and some can be clicked to see existing objects, e.g. click 
Open Screen to list existing screens, which can then be dragged from the Repository onto the canvas.
Most action nodes run once per record they receive from the input connection point. However, some action nodes only run after receiving the final record or once per flow, e.g. Open Screen, 
Start Phase and 
Open URL nodes.
Where attributes require processing by an action node, e.g. in an expression, the attributes must be mapped in as Input Parameters. These attributes are then mapped out of the action node as Output Attributes. Connectors between the action nodes pass through every attribute*, including any not mapped**. *attributes not mapped are referred to as pass-through attributes. **there can be exceptions, e.g. Converge action. Once mappings are configured they will reused in all instances of the Actionflow. This is because the action nodes sit within the Actionflow itself and only the data coming into and out of an Actionflow changes for each instance.
