def METHOD_NAME():
    """Return a dictionary containing the mailcap database.
    The dictionary maps a MIME type (in all lowercase, e.g. 'text/plain')
    to a list of dictionaries corresponding to mailcap entries.  The list
    collects all the entries for that MIME type from all available mailcap
    files.  Each dictionary contains key-value pairs for that MIME type,
    where the viewing command is stored with the key "view".
    """
    caps = {}
    for mailcap in listmailcapfiles():
        try:
            fp = open(mailcap, 'r')
        except IOError:
            continue
        morecaps = readmailcapfile(fp)
        fp.close()
        for key, value in morecaps.iteritems():
            if not key in caps:
                caps[key] = value
            else:
                caps[key] = caps[key] + value
    return caps