Ports

Ports are how nodes are connected to each other. Data flows out of one port into another. This data can be either graphical such as Raster of Vector, or it can be the values stored in parameters.

Typically ports will only connect to other ports of the same type but there are some exceptions. Single channel numerical parameters can be interconnected because the value can be easily converted to the desired format.

All output ports can connect to multiple input ports. The same data is sent out to all the inputs. Most input ports can only be connected to one output port. There are special exceptions for certain nodes that can combine data from multiple sources.

The visual different between the port types. Ports that only allow one connection are circular. Ports that permit multiple connections are elongated.