Browse Prior Art Database

Proposed Federal Information Processing Standard: Specification for message format for computer based message systems (RFC0806)

IP.com Disclosure Number: IPCOM000003855D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2019-Feb-14

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

National Bureau of Standards: AUTHOR

Related Documents

10.17487/RFC0806: DOI

Abstract

This RFC deals with Computer Based Message systems which provides a basis for interaction between different CBMS by defining the format of messages passed between them. This RFC is replaced by RFC 841.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 5% of the total text.

Network Working Group Request for Comments: 806

Proposed Federal Information Processing Standard

SPECIFICATION FOR MESSAGE FORMAT FOR COMPUTER BASED MESSAGE SYSTEMS

National Bureau of Standards Institute for Computer Sciences and Technology

September 1981

TABLE OF CONTENTS

Page

EXECUTIVE SUMMARY 1

1. INTRODUCTION 3

1.1 Guide to Reading This Document 3 1.2 Vendor-Defined Extensions to the Specification 4 1.3 The Scope of the Message Format Specification 4 1.4 Issues Not Within the Scope of the Message Format 4 Specification 1.5 Relationship to Other Efforts 5

2. A SIMPLE MODEL OF A CBMS ENVIRONMENT 6

2.1 Logical Model of a CBMS 8 2.2 Relationship to the ISO Reference Model for Open 10 Systems Interconnection 2.3 Messages and Fields 10 2.4 Message Originators and Recipients 11

3. SEMANTICS 12

3.1 Semantics of Message Fields 12 3.1.1 Types of fields 12 3.1.2 Semantic Compliance Categories 13 3.1.3 Originator fields 13 3.1.4 Recipient fields 14 3.1.5 Date fields 15 3.1.6 Cross-reference fields 16 3.1.7 Message-handling fields 16 3.1.8 Message-content fields 17 3.1.9 Extensions 18

i

3.2 Message Processing Functions 18 3.2.1 Message creation and posting 19 3.2.2 Message reissuing and forwarding 20 3.2.2.1 Redistribution 22 3.2.2.2 Assignment 22 3.2.3 Reply generation 23 3.2.4 Cross referencing 24 3.2.4.1 Unique identifiers 24 3.2.4.2 Serial numbering 24 3.2.5 Life span functions 25 3.2.6 Requests for recipient processing 25 3.2.6.1 Message circulation 26 3.3 Multiple Occurrences and Ordering of Fields 26

4. SYNTAX 28

4.1 Introduction 28 4.1.1 Message structure 28 4.1.2 Data elements 29 4.1.2.1 Primitive data elements 30 4.1.2.2 Constructor data elements 30 4.1.3 Properties 30 4.1.3.1 Printing-names 30 4.1.3.2 Comments 31 4.1.4 Data compression and encryption 31 4.1.5 Data sharing 31 4.2 Overview of Syntax Encoding 32 4.2.1 Identifier Octets 32 4.2.2 Length code and Qualifier components 33 4.2.2.1 Length Codes 35 4.2.2.2 Qualifier 36 4.2.3 Property-List 38 4.2.4 Data Element Contents 38 4.3 Data Element Syntax 39 4.3.1 Data elements 39 4.3.1.1 Primitives 42 4.3.1.2 Constructors 44 4.3.2 Using data elements within message fields 48 4.3.3 Properties and associated elements 49 4.3.4 Encryption identifiers 49 4.3.5 Compression identifiers 49 4.3.6 Message types 50

SUMMARY OF APPENDIXES 51

ii

APPENDIX A. FIELDS -- IMPLEMENTORS’ MASTER REFERENCE 52

APPENDIX B. DATA ELEMENTS -- IMPLEMENTORS’ MASTER REFERENCE 57

APPENDIX C. DATA ELEMENT IDENTIFIER OCTETS 65

APPENDIX D. SUMMARY OF MESSAGE FIELDS BY COMPLIANCE 66 CATEGORY

D.1 REQUIRED Fields 66 D.2 BASIC Fields 66 D.3 OPTIONAL Fields 66

APPENDIX E. SUMMARY OF MESSAGE SEMANTICS BY FUNCTION 68

E.1 Circulation 68 E.2 Cross Referencing 68 E.3 Life spans 68 E.4 Delivery System 68 E.5 Miscellaneous Fields Used Generally 69 E.6 Reply Generation 69 E.7 Reissuing 69 E.8 Sending (Normal Transmission) 69

APPENDIX F. SUMMARY OF DATA ELEMENT SYNTAX 70

APPENDIX G. SUMMARY OF DATA ELEMENTS BY COMPLIANCE CATEGORY 72

G.1 BASI...

Processing...
Loading...