MIME E-mail Encapsulation of Aggregate Documents, such as HTML (MHTML)
RFC 2110
Document | Type |
RFC - Proposed Standard
(March 1997; No errata)
Obsoleted by RFC 2557
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Last updated | 2013-03-02 | ||
Stream | IETF | ||
Formats | plain text pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 2110 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) |
Network Working Group J. Palme Request for Comments: 2110 Stockholm University/KTH Category: Standards Track A. Hopmann Microsoft Corporation March 1997 MIME E-mail Encapsulation of Aggregate Documents, such as HTML (MHTML) Status of this Document 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. Abstract Although HTML [RFC 1866] was designed within the context of MIME, more than the specification of HTML as defined in RFC 1866 is needed for two electronic mail user agents to be able to interoperate using HTML as a document format. These issues include the naming of objects that are normally referred to by URIs, and the means of aggregating objects that go together. This document describes a set of guidelines that will allow conforming mail user agents to be able to send, deliver and display these objects, such as HTML objects, that can contain links represented by URIs. In order to be able to handle inter-linked objects, the document uses the MIME type multipart/related and specifies the MIME content-headers "Content- Location" and "Content-Base". Table of Contents 1. Introduction.............................................. 2 2. Terminology............................................... 3 2.1 Conformance requirement terminology................... 3 2.2 Other terminology..................................... 4 3. Overview.................................................. 5 4. The Content-Location and Content-Base MIME Content Headers 6 4.1 MIME content headers.................................. 6 4.2 The Content-Base header............................... 7 4.3 The Content-Location Header........................... 7 4.4 Encoding of URIs in e-mail headers.................... 8 5. Base URIs for resolution of relative URIs................. 8 6. Sending documents without linked objects.................. 9 7. Use of the Content-Type: Multipart/related................ 9 8. Format of Links to Other Body Parts....................... 11 Palme & Hopmann Standards Track [Page 1] RFC 2110 MHTML March 1997 8.1 General principle..................................... 11 8.2 Use of the Content-Location header.................... 11 8.3 Use of the Content-ID header and CID URLs............. 12 9 Examples................................................... 12 9.1 Example of a HTML body without included linked objects 12 9.2 Example with absolute URIs to an embedded GIF picture 13 9.3 Example with relative URIs to an embedded GIF picture 13 9.4 Example using CID URL and Content-ID header to an embedded GIF picture.................................. 14 10. Content-Disposition header............................... 15 11. Character encoding issues and end-of-line issues......... 15 12. Security Considerations.................................. 16 13. Acknowledgments.......................................... 17 14. References............................................... 18 15. Author's Address......................................... 19 Mailing List Information Further discussion on this document should be done through the mailing list MHTML@SEGATE.SUNET.SE. To subscribe to this list, send a message to LISTSERV@SEGATE.SUNET.SE which contains the text SUB MHTML <your name (not your e-mail address)> Archives of this list are available by anonymous ftp from FTP://SEGATE.SUNET.SE/lists/mHTML/ The archives are also available by e-mail. Send a message to LISTSERV@SEGATE.SUNET.SE with the text "INDEX MHTML" to get a list of the archive files, and then a new message "GET <file name>" to retrieve the archive files. Comments on less important details may also be sent to the editor, Jacob Palme <jpalme@dsv.su.se>. More information may also be available at URL: HTTP://www.dsv.su.se/~jpalme/ietf/jp-ietf-home.HTML 1. Introduction There are a number of document formats, HTML [HTML2], PDF [PDF] and VRML for example, which provide links using URIs for their resolution. There is an obvious need to be able to send documents in these formats in e-mail [RFC821=SMTP, RFC822]. This document gives additional specifications on how to send such documents in MIME [RFC 1521=MIME1] e-mail messages. This version of this standard was basedShow full document text