type strings rather than
             the more traditional human readable ones. Thus it may say
             ‘text/plain; charset=us-ascii’ rather than ‘ASCII text’.  In
             order for this option to work, file changes the way it handles
             files recognized by the command itself (such as many of the text
             file types, directories etc), and makes use of an alternative
             ‘magic’ file.  (See the FILES section, below).

     --mime-type, --mime-encoding
      