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+<HEAD>
+<TITLE>Improving FidoNet/UseNet gating and Dupe Checking.</TITLE>
+</HEAD>
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+<PRE>
+Document:   FSC-0070
+Date:       15-Jul-94
+Revision:   002
+
+              Improving Fidonet/Usenet gating and Dupe Checking
+                              
+                    Franck Arnaud, Fidonet 2:320/213.666
+
+
+
+  Status of this document
+  -----------------------
+
+ This FSC suggests a proposed standard for the FidoNet(r) community,
+ and invites discussion and suggestions for improvements. Distribution of
+ this document is unlimited.
+
+ Fido and FidoNet are registered marks of Tom Jennings and Fido Software.
+   
+
+  Introduction
+  ------------
+
+ The complexity of Usenet/Fidonet gating and the large number of gateways
+ has led to a non-negligible quantity of duplicates appearing regularly in 
+ both the Usenet and Fidonet worlds. This proposal defines a standard method 
+ for gateway software to deal with conversion of message identifiers between 
+ both worlds, so that we can improve the reliability of Usenet/Fidonet 
+ gateways.
+
+ In this document "^" means <control-A> (character 01h).
+
+
+  History
+  -------
+
+ Revision 002 adds details and makes the Fidonet to Usenet sheme FTS-0009
+ compliant.
+
+
+  Usenet To Fidonet Message Identifier Conversion
+  -----------------------------------------------
+
+ A major problem is preventing messages gated into Fidonet from RFC822 from
+ being gated back to Usenet at another gateway with a new message id. The
+ easy way to solve that is simply to store the RFC message ID in a kludge 
+ line. This kludge line could also allow identifying messages gated from 
+ Usenet (this could be used by message editors to allow private replies to 
+ the nearest uucp gateway for example).
+
+ It is proposed that the ^RFCID: kludge is used to store the RFC Message-ID:
+ in Fidonet messages. Of course, the use of the RFCID kludge doesn't replace
+ the standard fts-0009 Message-ID:.
+
+       (Usenet)  Message-ID: <92_feb_10_19192012901@prep.ai.mit.edu>
+    to (Fido)    ^MSGID: 2:300/400.5 6789fedc
+                 ^RFCID: 92_feb_10_19192012901@prep.ai.mit.edu
+
+ Note ^RFCID does not include the Message-ID enclosing "<" and ">".
+
+ Then if a gateway finds a ^RFCID line in a Fido message, it will use it in
+ the Usenet message ID, instead of converting the ^MSGID.
+
+
+  Fidonet to Usenet Message Identifiers Conversion
+  ------------------------------------------------
+
+ The dupe checking in Usenet is based on the message ID. Fidonet now has its
+ own standard message identification standard (fts-0009).
+
+ So it would be interesting if the same Fidonet message gated at different
+ gateways had the same ID in Usenet to help news processing programs in
+ stopping dupes.
+
+ The proposed fido ^MSGID: to RFC1036 Message-ID: conversion method is 
+ defined as below:
+
+ The ^MSGID: value (a string) is not parsed and converted as below to the ID
+ part of Usenet's Message-ID. The Message-ID domain is the fidonet domain,
+ "fidonet.org" if the gated echomail comes from the Fidonet(tm) network.
+
+ To convert the MSGID string, the following rules are applied:
+ - Alphanumeric (a-z,A-Z,0-9) characters are kept intact (case preserved).
+ - Non-alphanumeric characters - including the space beetwen the origin
+   address and the serial number - are converted to '-'.
+
+ Some examples:
+
+    (Fido)   ^MSGID: 2:300/400 12345AbC
+ to (Usenet) Message-ID: <2-300-400-12345AbC@fidonet.org>
+
+    (Fido)   ^MSGID: 15:300/400.50@somenet abcd6789
+ to (Usenet) Message-ID: <15-300-400-50-somenet-abcd6789@fidonet.org>
+
+    (Fido)   ^MSGID: Internet.Domain.org aBcD1234
+ to (Usenet) Message-ID: <Internet-Domain-org-aBcD1234@fidonet.org>
+
+    (Fido)   ^MSGID: "LZKkoe$1982 98a" 45678bcd
+ to (Usenet) Message-ID: <-LZKkoe-1982-98a--45678bcd@fidonet.org>
+
+
+</PRE>
+
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