Where can I get the xdg menu hierarchy

Question

I've consulted the following articles and many more, but still don't understand one question --

What menu hierarchy do freedesktop (or Ubuntu or any modern distro) use? Where can I get a list of such menu hierarchy? E.g., the "Accessories", "Internet", "Editor", "System" etc that type of things, and what corresponding Categories it is accepting from the .desktop file.

• https://standards.freedesktop.org/desktop-entry-spec/latest/
• https://standards.freedesktop.org/menu-spec/latest/apa.html
• How can I put my GTK application in the desktop menus?
• Desktop files: putting your application in the desktop menus
• ANATOMY OF A .DESKTOP FILE

Answer 1

Found it,

Under /etc/xdg/menus/ (under Debian/Ubuntu).
E.g., /etc/xdg/menus/gnome-applications.menu.