Issue in the Hydraulic Circuit of the Document "Hydraulic Axial-Piston Pump with Load-Sensing and Pressure-Limiting Control"

There is a serius issue in the Document "Hydraulic Axial-Piston Pump with Load-Sensing and Pressure-Limiting Control"

The hydraulic circuit shown is incorrect. It doen't potray the correct hydraulic circuit as per the simscape model block.

Also the simulink block model is not given. The Directional Control Valve is not properly potrayed using hydraulic circuit symbols. The use of the relief valve is also questionable. Transfer function of the pump LSPC & Physical system are also missing.

https://in.mathworks.com/help/hydro/ug/hydraulic-axial-piston-pump-with-load-sensing-and-pressure-limiting-control.html?searchHighlight=load%20sensing%20&s_tid=srchtitle_load%20sensing%20_1

Somebody please clarify these matters to me and correct me if I am wrong.