Xref: utzoo comp.misc:3142 comp.std.misc:45 comp.mail.misc:1182 comp.mail.uucp:1658 Path: utzoo!attcan!uunet!modcomp!nigel From: nigel@modcomp.UUCP (Nigel Gamble) Newsgroups: comp.misc,comp.std.misc,comp.mail.misc,comp.mail.uucp Subject: Re: Standardizing Email? Message-ID: <123@modcomp.UUCP> Date: 18 Aug 88 02:59:12 GMT References: <145@chiron.UUCP> Distribution: comp Lines: 35 in article <145@chiron.UUCP>, jon@chiron.UUCP (Jon L. Griffeth) says: > X.400 is actually a series of recommendations made by CCITT concerning > the format of electronic messages and their subsequent transmission. > It references numerous other recommendations and relies heavily > on the Abstract Syntax Notation 1 (ANS.1). If anyone can tell how > to obtain information on ANS.1, I'd be greatful. I seem to have missed > it in my search. Abstract Syntax Notation One (ASN.1) is part of the Presentation Layer (layer 6) of the ISO/OSI 7 layer comms. protocol stack. The relevant ISO standards are: DIS 8824 Specification of Abstract Syntax Notation One (ASN.1) DIS 8825 Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1) The corresponding CCITT document is: X.409 Message Handling Systems: Presentation Transfer Syntax and Notation (ISO documents can be obtained from the American National Standards Institute (ANSI), which is the United States member body in the International Organization for Standardization (ISO).) > P.S. If anyone can direct me towards a GOOD book on OSI, I would > again be greatful. OSI is the basis for an international networking > standard. Anyone wanting to learn about X.400 should learn this as > well. The best book I have found (from which the above information is taken) is "Handbook of Computer Communications Standards, Volume 1: The Open Systems Interconnection (OSI) Model and OSI-related Standards" by William Stallings, published by Macmillan. -- Nigel Gamble "Everything should be made as simple as possible, MODCOMP/AEG but not simpler." Albert Einstein. uunet!modcomp!nigel