It looks like we've acquired quite a few new options in desktop files lately. Some of these are explained in very narrow posts, such as how to add a static quicklist to a Unity LauncherEntry. Others are difficult to find documentation for. We seem to have non-standard items in some Gnome applications, for instance, beginning with X-GNOME-
So the question is: where can I find information about all of these, including these extensions? Are there extensions for all desktop environments, like KDE, Xfce and LXDE as well? In other words, what I am seeking, is a complete desktop file reference. Before you answer, please check for duplicates in http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s05.html. Those are standard and that's a good reference for those. It is all those other types I'm interested in.
http://standards.freedesktop.org/desktop-entry-spec/latest/index.html#introduction
This page has some sort of specs for
.desktop
files.There doesn't seem to be any such centralized documentation for all .desktop file options. That would've been nice. I'll mark this as answered for now, but if someone makes such a documentation site, please edit this answer, or add a new one and I'll accept that instead. Because I think the question is valid, even if there are no answers.