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-latest.html 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. -- Fedora-desktop-list mailing list Fedora-desktop-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-desktop-list