This directory (/home/lbesnard/Polychrony/V4.19/Linux/Examples/apex) contains some examples that use the servives defined in APEX/ARINC653 (avionic norm). The Signal apex/arinc library is provided in the Polychrony toolset (in the directory: /home/lbesnard/Polychrony/V4.19/Linux/SignalLibraries/Apex).
See an example of the modeling of modular avionics architectures.