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CSA ISO/IEC 8825-7:22

Information technology — ASN.1 encoding rules - Part 7: Specification of Octet Encoding Rules (OER) (Adopted ISO/IEC 8825-7:2021, third edition, 2021-06)

SKU: 2429987 Published by CSA Group Publication Year 2022 45 pages

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CSA Preface

Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the SCC Mirror Committee (SMC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC.

For brevity, this Standard will be referred to as CSA ISO/IEC 8825-7 throughout.

This Standard supersedes CSA ISO/IEC 8825-7:20 (adopted ISO/IEC 8825-7:2015).

The International Standard was reviewed by the CSA TCIT under the jurisdiction of the CSA Strategic Steering Committee on Information and Communications Technology and deemed acceptable for use in Canada. This Standard has been formally approved, without modification, by the Technical Committee and has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Scope

This Recommendation | International Standard specifies a set of Basic Octet Encoding Rules (BASIC-OER) that may be used to derive a transfer syntax for values of the types defined in Rec. ITU-T X.680 | ISO/IEC 8824-1, Rec. ITU-T X.681 | ISO/IEC 8824-2, Rec. ITU-T X.682 | ISO/IEC 8824-3, Rec. ITU-T X.683 | ISO/IEC 8824-4. This Recommendation | International Standard also specifies a set of Canonical Octet Encoding Rules (CANONICAL-OER) which provides constraints on the Basic Octet Encoding Rules and produces a unique encoding for any given ASN.1 value. It is implicit in the specification of these encoding rules that they are also to be used for decoding.

The encoding rules specified in this Recommendation | International Standard:

– are used at the time of communication;

– are intended for use in circumstances where encoding/decoding speed is the major concern in the choice of encoding rules;

– allow the extension of an abstract syntax by addition of extra values for all forms of extensibility described in Rec. ITU-T X.680 | ISO/IEC 8824-1.

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CSA ISO/IEC 8825-7:22

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CSA ISO/IEC 8825-7:20

Information technology — ASN.1 encoding rules: Specification of Octet Encoding Rules (OER) (Adopted ISO/IEC 8825-7:2015, second edition, 2015-11-15, including technical corrigendum 2:2017, technical corrigendum 3:2018 and technical corrigendum 4:2018)

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CSA ISO/IEC 8825-7:22

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CSA ISO/IEC 8825-7:20

Information technology — ASN.1 encoding rules: Specification of Octet Encoding Rules (OER) (Adopted ISO/IEC 8825-7:2015, second edition, 2015-11-15, including technical corrigendum 2:2017, technical corrigendum 3:2018 and technical corrigendum 4:2018)

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