librest1.0-demo-0.9.1-alt2.x86_64	freedesktop-categories	fail	Main Categories consist of those categories that every conforming desktop environment MUST support.(http://standards.freedesktop.org/menu-spec/latest/apa.html). None found in /usr/share/applications/org.gnome.RestDemo.desktop. please, fix. Menu-related Additional Categories (http://standards.freedesktop.org/menu-spec/latest/apa.html) not found in /usr/share/applications/org.gnome.RestDemo.desktop. Please add it or report a bug against this test if you already have registered one (not including menu unrelated ones as Core or Qt).; 
librest1.0-demo-0.9.1-alt2.x86_64	freedesktop-desktop	info	desktop-file-validate utility printed the following message(s): /usr/share/applications/org.gnome.RestDemo.desktop: hint: value "GTK;" for key "Categories" in group "Desktop Entry" does not contain a registered main category; application might only show up in a "catch-all" section of the application menu;