path address

This term is defined in ECSS-E-ST-50-12C as
series of one or more data characters at the start of a packet which define the route to be taken across a SpaceWire network

This term is defined in ECSS-E-ST-50-51C as
sequence of one or more SpaceWire data characters that defines the route to a target by specifying, for each router encountered on the way to the target, the output port that a Packet is forwarded through