ADD/CATALOG Add one or more entries to a catalogueCOPY/DD Copy descriptors from one file to another
CREATE/CATALOG Create a catalogue
DELETE/DESCRIPTOR Delete a descriptor
INFO/DESCRIPTOR Get type and size of descriptor
READ/DESCRIPTOR Read descriptors
RENAME/... Rename a frame
SORT/CATALOG Sort entries in a catalogue
SUBTRACT/CATALOG Remove an entry from a catalogue
WRITE/DESCRIPTOR Write a descriptor