Hyppocampus

Add and manage an addictional metadata (or more) dedicated to executable,
which indicate mimetypes handled by the application herself. So it would be
possible store informations about MIME associations into filesystem (not in
formatted files), building the VFS abstraction in LibHyppo on top of those
indications.
As secondary target, it would be possible manage mimetypes as atomic
"items" into filesystem, linking them metadata about default icon, default
application etc...