Title: MIME (Multipurpose Internet Mail Extensions) Part One: Mechanisms for Specifying and Describing the Format of Internet Message Bodies
Author(s): N. Borenstein, N. Freed.
Status: DRAFT STANDARD
Date: Sep 1993
Length: 205091
Obsoletes: RFC1341
Obsoleted by: RFC2045, RFC2046, RFC2047, RFC2048, RFC2049
Updated by: RFC1590
STD 11, RFC822 defines a message representation protocol which specifies considerable detail about message headers, but which leaves the message content, or message body, as flat ASCII text. This document redefines the format of message bodies to allow multi-part textual and non-textual message bodies to be represented and exchanged without loss of information. This is based on earlier work documented in RFC934 and STD 11, RFC1049, but extends and revises that work. Because RFC822 said so little about message bodies, this document is largely orthogonal to (rather than a revision of) RFC822.
In particular, this document is designed to provide facilities to include multiple objects in a single message, to represent body text in character sets other than US-ASCII, to represent formatted multi- font text messages, to represent non-textual material such as images and audio fragments, and generally to facilitate later extensions defining new types of Internet mail for use by cooperating mail agents.
This document does NOT extend Internet mail header fields to permit anything other than US-ASCII text data. Such extensions are the subject of a companion document [RFC1522].
This document is a revision of RFC1341. Significant differences from RFC1341 are summarized in Appendix H.
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