Best way to register a file format plugin for an app with nautilus's mime-handler etc.

[Caolán McNamara]

So, here's the example scenario: Someone writes an extension for
OpenOffice.org writer which adds a file format importer and that gets
packaged into Fedora. Is there a way to then register the extra
mime-type that writer now supports if, and only if, that extension is
installed.

The mime-type field in .desktops
http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-la...
basically assumes a static list of supported mime-types. Adding the
mime-type to the writer list would claim that it always can open the
type, which isn't true if the extension isn't installed.

So is the right solution to install a new .destop along with that
extension with NoDisplay=true set and the list of extra mime-types that
the extension adds to writer and then use the same Exec line from the
normal parent package .desktop ?

C.