ISO/IEC 8823-1:1994 情報技術—オープンシステム相互接続—コネクション型プレゼンテーションプロトコル：プロトコル仕様 | ページ 2

1.1この ITU-T 勧告 |国際規格は次のように規定しています。

• a) 1 つのプレゼンテーション エンティティからピア プレゼンテーション エンティティへのデータおよび制御情報の転送手順。
• b)機能単位によって、プレゼンテーションエンティティによって使用される手順を選択する手段。
• c)データと制御情報の転送に使用されるプレゼンテーションプロトコルデータユニットの構造と符号化。

手順は、次の観点から定義されています。

• d)プレゼンテーション プロトコル データ ユニットの交換によるピア プレゼンテーション エンティティ間の相互作用。
• e)プレゼンテーション サービス プリミティブの交換による、同じシステム内のプレゼンテーション エンティティとプレゼンテーション サービス ユーザ間の対話。
• f)セッション サービス プリミティブの交換による、プレゼンテーション エンティティとセッション サービス プロバイダー間の相互作用。

1.2これらの手順は、この ITU-T 勧告の本文で定義されています。附属書 A の状態表によって補足される国際規格。

1.3これらの手順は、OSI 参照モデルのプレゼンテーション層をサポートし、OSI 環境で相互接続を希望するシステム間の通信のインスタンスに適用されます。

1.4この ITU-T 勧告 |国際規格は、これらの手順を実装するシステムの適合基準も指定します。この適合性を実証するために使用できるテストは含まれていません。

Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.

In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.

International Standard ISO/IEC 8823-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 21, Open systems interconnection, data management and open distributed processing, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.226.

This second edition cancels and replaces the first edition (ISO 8823:1988), and is a consolidation of the first edition and Amendment 5:1992.

ISO/IEC 8823 consists of the following parts, under the general title Information technology — Open Systems Interconnection — Connection-oriented presentation protocol:

• Part 1: Protocol specification
• Part 2: Protocol Implementation Conformance Statement (PICS) Proforma

Annexes A and B form an integral part of this part of ISO/IEC 10026. Annex C is for information only.

Introduction

This ITU-T Recommendation | International Standard is one of a set of Recommendations | International Standards produced to facilitate the interconnection of information processing systems. It is related to other Recommendations | International Standards in the set as defined by the Reference Model for Open Systems Interconnection (ITU-T Rec. X.200 | ISO/IEC 7498). The Reference Model subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size.

This ITU-T Recommendation | International Standard specifies a common encoding and a number of functional units of presentation protocol procedures to be used to meet the needs of presentation-service-users. It is intended that the presentation protocol should be simple but general enough to cater for the total range of presentation-service-user needs without restricting future extensions.

The primary aim of this ITU-T Recommendation | International Standard is to provide a set of rules for communication expressed in terms of the procedures to be carried out by peer entities at the time of communication. These rules for communication are intended to provide a sound basis for development in order to serve a variety of purposes:

• a) as a guide for implementors and designers;
• b) for use in the testing and procurement of equipment;
• c) as part of an agreement for the admittance of systems into the open systems environment;
• d) as a refinement of the understanding of OSI.

It is expected that the initial users of this ITU-T Recommendation | International Standard will be designers and implementors of equipment and therefore it contains, in notes or in annexes, guidance on the implementation of its procedures.

It has not been possible as yet to prepare a product standard containing a set of objective tests for conformance to this ITU-T Recommendation | International Standard, but it does contain a section on conformance of equipment claiming to implement the procedures it specifies. Attention is drawn to the fact that this ITU-T Recommendation | International Standard does not contain any tests to demonstrate this conformance and cannot, therefore, be considered as a complete product standard. The variations and options available within this ITU-T Recommendation | International Standard are essential to enable a presentation-service to be provided for a wide variety of applications. Thus, a minimally conforming implementation will not be suitable for use in all possible circumstances. It is necessary, therefore, to qualify all references to this ITU-T Recommendation | International Standard with statements of the options provided or required, or with statements of the intended purpose of provision or use.

1 Scope ¹⁾

2 Normative references

The following ITU-T Recomendations and International Standards contain provisions which, through reference in this text, constitute provisions of this ITU-T Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this ITU-T Recommendation | International Standard are encouraged to investigate the possibility of appllying the most recent editions of the Standards and Recommendations listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The ITU-T Secretariat maintains a list of currently valid ITU-T Recommendations.

2.1 Identical ITU-T Recommendations | International Standards

2.2 Paired ITU-T Recommendations | International Standards equivalent in technical content

2.3 Additional References