RFC2854 The 'text/html' Media Type
2854 The 'text/html' Media Type. D. Connolly, L. Masinter. June 2000. (Format: TXT=16135 bytes) (Obsoletes RFC2070, RFC1980, RFC1942, RFC1867, RFC1866) (Status: INFORMATIONAL)
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参照
Network Working Group D. Connolly
Request for Comments: 2854 World Wide Web Consortium (W3C)
Obsoletes: 2070, 1980, 1942, 1867, 1866 L. Masinter
Category: Informational AT&T
June 2000
The 'text/html' Media Type
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
This document summarizes the history of HTML development, and defines
the "text/html" MIME type by pointing to the relevant W3C
recommendations; it is intended to obsolete the previous IETF
documents defining HTML, including RFC 1866, RFC 1867, RFC 1980, RFC
1942 and RFC 2070, and to remove HTML from IETF Standards Track.
This document was prepared at the request of the W3C HTML working
group. Please send comments to www-html@w3.org, a public mailing list
with archive at
Larry Masinter
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RFC 2854 The 'text/html' Media Type June 2000
Intended usage: COMMON
Author/Change controller:
The HTML specification is a work product of the World Wide Web
Consortium's HTML Working Group. The W3C has change control over
the HTML specification.
Further information:
HTML has a means of including, by reference via URI, additional
resources (image, video clip, applet) within the base document. In
order to transfer a complete HTML object and the included
resources in a single MIME object, the mechanisms of [MHTML] may
be used.
3. Fragment Identifiers
The URI specification [URI] notes that the semantics of a fragment
identifier (part of a URI after a "#") is a property of the data
resulting from a retrieval action, and that the format and
interpretation of fragment identifiers is dependent on the media type
of the retrieval result.
For documents labeled as text/html, the fragment identifier
designates the correspondingly named element; any element may be
named with the "id" attribute, and A, APPLET, FRAME, IFRAME, IMG and
MAP elements may be named with a "name" attribute. This is described
in detail in [HTML40] section 12.
4. Encoding considerations
Because of the availability within HTML itself for using character
entity references, documents that use a wide repertoire of characters
may still be represented using the US-ASCII charset and transported
without encoding. However, transport of text/html using a charset
other than US-ASCII may require base64 or quoted-printable encoding
for 7-bit channels.
As with all MIME text subtypes, the canonical form of "text/html"
must always represent a line break as a sequence of a CR byte value
(0x0D) followed by an LF (0x0A) byte value. Similarly, any
occurrence of such a CRLF sequence in "text/html" must represent a
line break. Use of CR byte values and LF byte values outside of line
break sequences is also forbidden. This rule applies regardless of
the character encoding ('charset') involved.
Connolly & Masinter Informational [Page 4]
RFC 2854 The 'text/html' Media Type June 2000
Note, however, that the HTTP protocol allows the transport of data
not in canonical form, and, in particular, with other end-of-line
conventions; see [HTTP] section 3.7.1. This exception is commonly
used for HTML.
HTML sent via email is still subject to the MIME restrictions; this
is discussed fully in [MHTML] Section 10.
5. Recognizing HTML files
Almost all HTML files have the string ").
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RFC 2854 The 'text/html' Media Type June 2000
[HTML32] Raggett, D., "HTML 3.2 Reference Specification", W3C
Recomendation, January 1997.
Available at .
[HTML40] Raggett, D., et al., "HTML 4.0 Specification", W3C
Recommendation, December 1997.
Available at
[HTML401] Raggett, D., et al., "HTML 4.01 Specification", W3C
Recommendation, December 1999.
Available at .
[HTTP] Gettys, J., Fielding, R., Mogul, J., Frystyk, H.,
Masinter, L., Leach, P. and T. Berners-Lee, "Hypertext
Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.
[I18N] Yergeau, F., Nicol, G. and M. Duerst,
"Internationalization of the Hypertext Markup Language",
RFC 2070, January 1997.
[MHTML] Palme, J., Hotmann, A. and N. Shelness, "MIME
Encapsulation of Aggregate Documents, such as HTML
(MHTML)", RFC 2557, March 1999.
[MIME] Freed, N. and N. Borenstein, "Multipurpose Internet Mail
Extensions (MIME) Part Two: Media Types", RFC 2046,
November 1996.
[TABLES] Raggett, D., "HTML Tables", RFC 1942, May 1996.
[UPLOAD] Nebel, E. and L. Masinter, "Form-based File Upload in
HTML", RFC 1867, November 1995.
[URI] Berners-Lee, T., Fielding, R. and L. Masinter, "Uniform
Resource Identifiers (URI): Generic Syntax", RFC 2396,
August 1998.
[XHTML1] "XHTML 1.0: The Extensible HyperText Markup Language: A
Reformulation of HTML 4 in XML 1.0", W3C Recommendation,
January 2000. Available at .
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RFC 2854 The 'text/html' Media Type June 2000
10. Full Copyright Statement
Copyright (C) The Internet Society (2000). All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
Connolly & Masinter Informational [Page 8]
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