The node connection rules are based on the link type allowed between each node output and input. When you draw links between outputs and inputs, the UD plugin will prevent you from configuring the links to join incompatible inputs and outputs together.
In the Node Model detailed descriptions, each node model input and output has a link type listed. The table below summarises these connection rules in one place.
...
Multiple connection combinations are supported by using the Add button.
Figure 1. Runoff link interface
