application-document associations

["Murray Cumming" <murrayc usa net>]

Are we supposed to be using file extensions (e.g. something.gnumeric) to
identify file types in GNOME? If so:

- How can I tell GNOME about new file types?

- Shouldn't there be a central list of registered file extensions? Apple has
this for their file identifiers. MS does not, and many applications use the
same extensions, leading to chaos.