[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

rfc 3229 on Delta encoding in HTTP

A new Request for Comments is now available in online RFC libraries.

        RFC 3229

        Title:	    Delta encoding in HTTP
        Author(s):  J. Mogul, B. Krishnamurthy, F. Douglis,
                    A. Feldmann, Y. Goland, A. van Hoff,
                    D. Hellerstein 
        Status:     Standards Track
	Date:       January 2002
        Mailbox:    JeffMogul@acm.org, bala@research.att.com,
                    douglis@research.att.com, anja@cs.uni-sb.de,
                    yaron@goland.org, avh@marimba.com,
        Pages:      49
        Characters: 111953
        Updates/Obsoletes/SeeAlso:  None

        I-D Tag:    draft-mogul-http-delta-10.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3229.txt

This document describes how delta encoding can be supported as a
compatible extension to HTTP/1.1.

Many HTTP (Hypertext Transport Protocol) requests cause the retrieval
of slightly modified instances of resources for which the client
already has a cache entry.  Research has shown that such modifying
updates are frequent, and that the modifications are typically much
smaller than the actual entity.  In such cases, HTTP would make more
efficient use of network bandwidth if it could transfer a minimal
description of the changes, rather than the entire new instance of the
resource.  This is called "delta encoding."

This is now a Proposed Standard Protocol.

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.

This announcement is sent to the IETF list and the RFC-DIST list.
Requests to be added to or deleted from the IETF distribution list
should be sent to IETF-REQUEST@IETF.ORG.  Requests to be
added to or deleted from the RFC-DIST distribution list should

Details on obtaining RFCs via FTP or EMAIL may be obtained by sending
an EMAIL message to rfc-info@RFC-EDITOR.ORG with the message body 
help: ways_to_get_rfcs.  For example:

        To: rfc-info@RFC-EDITOR.ORG
        Subject: getting rfcs

        help: ways_to_get_rfcs

Requests for special distribution should be addressed to either the
author of the RFC in question, or to RFC-Manager@RFC-EDITOR.ORG.  Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.echo 
Submissions for Requests for Comments should be sent to
RFC-EDITOR@RFC-EDITOR.ORG.  Please consult RFC 2223, Instructions to RFC
Authors, for further information.

Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute


Below is the data which will enable a MIME compliant Mail Reader 
implementation to automatically retrieve the ASCII version
of the RFCs.