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Why have backward compatibility support for 1113 but not 1421?

1994-05-24 10:06:00
This I-D announcement (based on the abstract) seems to offer a useful
compatibility facility.  Given that 1113 (previous version of PEM)
is explicitly supported, is there a reason why 1421 can't also be
supported in the same fashion?

--jl

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Subject: I-D ACTION:draft-borenstein-mailcap-00.txt, .ps
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- --NextPart

A New Internet-Draft is available from the on-line Internet-Drafts 
directories.                                                               

       Title     : A User Agent Configuration Mechanism For Multimedia Mail
                   Format Information                                      
       Author(s) : N. Borenstein
       Filename  : draft-borenstein-mailcap-00.txt, .ps
       Pages     : 16
       Date      : 05/23/1994

This memo suggests a file format to be used to inform multiple mail reading
user agent programs about the locally-installed facilities for handling 
mail in various formats.  The mechanism is explicitly designed to work with
mail systems based Internet mail as defined by RFC's 821, 822, 934, 1049, 
1113, and the Multipurpose Internet Mail Extensions, known as MIME.  
However, with some extensions it could probably be made to work for 
X.400-based mail systems as well.  The format and mechanism are proposed in
a manner that is generally operating-system independent.  However, certain 
implementation details will inevitably reflect operating system 
differences, some of which will have to be handled in a uniform manner for 
each operating system.  This memo makes such situations explicit, and, in 
an appendix, suggests a standard behavior under the UNIX operating system. 

This is a minor update to RFC 1524.  Differences are detailed 
in Appendix E.                                                                  
       

Internet-Drafts are available by anonymous FTP.  Login with the 
username "anonymous" and password "guest".  After logging in,
Type "cd internet-drafts".
     "get draft-borenstein-mailcap-00.txt".
 Or 
     "get draft-borenstein-mailcap-00.ps".
 
Internet-Drafts directories are located at:     
                                                        
     o  US East Coast                            
        Address:  ds.internic.net (198.49.45.10)        
                                                        
     o  US West Coast                            
        Address:  ftp.isi.edu (128.9.0.32)      
                                                        
     o  Pacific Rim                              
        Address:  munnari.oz.au (128.250.1.21)  
                                                        
     o  Europe                                   
        Address:  nic.nordu.net (192.36.148.17) 
                                                        
Internet-Drafts are also available by mail.     
                                                        
Send a message to:  mailserv(_at_)ds(_dot_)internic(_dot_)net(_dot_) In the 
body type: 
     "FILE /internet-drafts/draft-borenstein-mailcap-00.txt".
 Or 
     "FILE /internet-drafts/draft-borenstein-mailcap-00.ps".
                                                        
For questions, please mail to 
Internet-Drafts(_at_)cnri(_dot_)reston(_dot_)va(_dot_)us(_dot_)
                                                        

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

- --NextPart
Content-Type: Multipart/Alternative; Boundary="OtherAccess"

- --OtherAccess
Content-Type:  Message/External-body;
        access-type="mail-server";
        server="mailserv(_at_)ds(_dot_)internic(_dot_)net"

Content-Type: text/plain
Content-ID: <19940523133959(_dot_)I-D(_at_)CNRI(_dot_)Reston(_dot_)VA(_dot_)US>

FILE /internet-drafts/draft-borenstein-mailcap-00.txt

- --OtherAccess
Content-Type:   Message/External-body;
        name="draft-borenstein-mailcap-00.txt";
        site="ds.internic.net";
        access-type="anon-ftp";
        directory="internet-drafts"

Content-Type: text/plain
Content-ID: <19940523133959(_dot_)I-D(_at_)CNRI(_dot_)Reston(_dot_)VA(_dot_)US>

- --OtherAccess--

- --NextPart--



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