| Number | Files | Title | Authors | Date | More Info | Status |
|---|---|---|---|---|---|---|
| RFC 4289,BCP 13 | ASCII,PDF | Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures | N. Freed, J. Klensin | December 2005 | ObsoletesRFC 2048 | Best Current Practice |
| RFC 6838,BCP 13 | ASCII,PDF | Media Type Specifications and Registration Procedures | N. Freed, J. Klensin, T. Hansen | January 2013 | ObsoletesRFC 4288, Updated byRFC 9694 | Best Current Practice |
| RFC 9694,BCP 13 | ASCII,PDF | Guidelines for the Definition of New Top-Level Media Types | M.J. Dürst | March 2025 | UpdatesRFC 6838 | Best Current Practice |
This document specifies IANA registration procedures for MIME external body access types and content-transfer-encodings. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
This document defines procedures for the specification andregistration of media types for use in HTTP, MIME, and other Internetprotocols. This memo documents an Internet Best Current Practice.
This document defines best practices for defining new top-level mediatypes. It also introduces a registry for top-level media types, andcontains a short history of top-level media types. It updates RFC6838.
For the definition ofStatus,seeRFC 2026.
For the definition ofStream, seeRFC 8729.