user preferred application for a mimetype

[Luc Menut]

Hi all,

I try to understand how should be defined the preferred application for 
a given mimetype according to freedesktop specifications.
I read
http://www.freedesktop.org/wiki/Specifications/mime-actions-spec
Is it still the reference document for this?

1) mimeapps.list and [Default Applications]
Since some versions, glib/gio uses a new section [Default Applications] 
in user ~/.local/share/applications/mimeapps.list.
This section is not defined in the freedesktop mime-actions-spec; in 
this document, IIUC, the preferred application for a given mimetype 
should be the first application from [Added Associations] for this mimetype.

Is this section [Default Applications] defined somewhere in a 
freedesktop specification or is it gnome specific?


2) preferences order
For a given mimetype, the order of applications and the preferred 
application can be defined in:
A - global mimeapps.list [Added Associations] 
(/usr/share/applications/mimeapps.list),
B - global defaults.list [Default Applications] 
(/usr/share/applications/defaults.list),
C - user mimeapps.list [Added Associations] 
(~/.local/share/applications/mimeapps.list),
D - user mimeapps.list [Default Applications],
E - user defaults.list [Default Applications] 
(~/.local/share/applications/defaults.list): is it still valid? or now 
deprecated?

Which order should be used to defined the user preferred application 
according to freedesktop specifications?

Regards,
Luc Menut