A link path dependency is a dependency between a propagated port and the ports in its link path.
When you propagate dependencies in a link path, the Developer tool updates all the input and input/output ports in its forward link path and all the output and input/output ports in its backward link path. The Developer tool performs the following updates:
Updates the port name, datatype, precision, scale, and description for all ports in the link path of the propagated port.
Updates all expressions or conditions that reference the propagated port with the changed port name.
Updates the associated port property in a dynamic Lookup transformation if the associated port name changes.