Thank you for your response,
Actually I m an active ATCO and I m preparing a study concerning the reform of ATCO ab initio training in my country, to be aligned with icao standards,I did some research I saw Glabal ATS and entrypoint and some other famous training institutions, I found all of them are using the terms " Icao05x" to present a part of atco training, so i tried to find an Icao link,but i didn t find any link "concerning terms"
the Doc10056 is really amazing that exactly what I want to do
Thank you so much