[Flags]public enum PortDirection

Use PortDirection to indicate whether a port receives or sends information. This enum supports bitwise operations which allows for combinations of values, although most ports are either PortDirection.Input or PortDirection.Output. The direction affects how the port is used in the graph. PortDirection.Input ports receive connections and typically appear on the left side of a node. PortDirection.Output ports initiate connections and typically appear on the right side of a node. Use PortDirection.None when a port has no fixed direction.