MIME Applications Associations

This specification allows users, system administrators, application vendors, and distributions, to control which application should open a file by default, and which applications should be shown as supporting a given MIME type (possibly overriding what the .desktop file for the application lists).

Mailinglist

Discussion of this specification should occur on xdg.

git

This specification is hosted in git, see mime-apps-spec.

Spec

References (predating the spec)