The MIME Multipart/Related Content-type (RFC2112)
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2019-Feb-15
Internet Society Requests For Comment (RFCs)
The Multipart/Related content-type provides a common mechanism for representing objects that are aggregates of related MIME body parts. This document defines the Multipart/Related content-type and provides examples of its use. [STANDARDS-TRACK]
Network Working Group E. Levinson Request for Comments: 2112 XIson, Inc. Category: Standards Track March 1997 Obsoletes: 1872
The MIME Multipart/Related Content-type
Status of this Memo
This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
The Multipart/Related content-type provides a common mechanism for representing objects that are aggregates of related MIME body parts. This document defines the Multipart/Related content-type and provides examples of its use.
Several applications of MIME, including MIME-PEM, and MIME-Macintosh and other proposals, require multiple body parts that make sense only in the aggregate. The present approach to these compound objects has been to define specific multipart subtypes for each new object. In keeping with the MIME philosophy of having one mechanism to achieve the same goal for different purposes, this document describes a single mechanism for such aggregate or compound objects.
The Multipart/Related content-type addresses the MIME representation of compound objects. The object is categorized by a "type" parameter. Additional parameters are provided to indicate a specific starting body part or root and auxiliary information which may be required when unpacking or processing the object.
Multipart/Related MIME entities may contain Content-Disposition headers that provide suggestions for the storage and display of a body part. Multipart/Related processing takes precedence over Content-Disposition; the interaction between them is discussed in section 4.
Responsibility for the display or processing of a Multipart/Related’s constituent entities rests with the application that handles the compound object.
Levinson Standards Track [Page 1]
RFC 2112 MIME Multipart/Related Content-type March 1997
2. Multipart/Related Registration Information
The following form is copied from RFC 1590, Appendix A.
To: IANA@isi.edu Subject: Registration of new Media Type content- type/subtype
Media Type name: Multipart
Media subtype name: Related
Required parameters: Type, a media type/subtype.
Optional parameters: Start Start-info
Encoding considerations: Multipart content-types cannot have encodings.
Security considerations: Depends solely on the referenced type.
Published specification: RFC-REL (this document).
Person & email address to contact for further information: Edward Levinson 47 Clive Street Metuchen, NJ 08840-1060 +1 908 494 1606 XIson@cnj.digex.net
3. Intended usage
The Multipart/Related media type is intended for compound objects consisting of several inter-related body parts. For a Multipart/Related object, proper display cannot be achieved by individually displaying the constituent body parts. The content-type of t...