mime/editor-mode
****************

   *mime/editor-mode* is a minor mode to compose MIME message.  In this
mode, *tag* represents various kinds of data, you can edit multi part
(See (tm-en)multipart) message.

   There are 2 kinds of tags:

   *  single-part tag

   *  multi-part tag

   single-part tag represents single part, this form is following:

             --[[TYPE/SUBTYPE;PARAMETERS][ENCODING]
             OPTIONAL-FIELDS]

   TYPE/SUBTYPE and PARAMETERS indicates type/subtype and parameters of
Content-Type field (See (tm-en)Content-Type field).  TYPE/SUBTYPE is
required, PARAMETERS is optional.

   ENCODING indicates Content-Transfer-Encoding field.  It is optional
too.

   OPTIONAL-FIELDS is to represent another fields except Content-Type
field and Content-Transfer-Encoding field.

   multi-part tags represent multi part (See (tm-en)multipart).
They consist of a pair of *multi-part beginning tag* and *multi-part
ending tag*.

   multi-part beginning tag's form is following:

             --<<TYPE>>-{

   multi-part ending tag's form is following:

             --}-<<TYPE>>

   A region from multi-part beginning tag to multi-part ending tag is
called as *enclosure*.