ISO/IEC 13235-3:1998 情報技術  —  オープン分散処理  —  取引機能  —  パート3：OSIディレクトリサービスを使用した取引機能の提供 | ページ 2

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 13235-3 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 33, Distributed application services, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.952.

ISO/IEC 13235-3 consists of the following parts, under the general title Information technology — Open Distributed Processing — Trading Function:

• Part 1: Specification
• Part 2: (TBD)
• Part 3: Provision of Trading Function using OSI Directory service

Annex A forms an integral part of this part of ISO/IEC 13235. Annex B is for information only.

Introduction

The ODP Trading Function (see ITU-T Rec. X.950-Series | ISO/IEC 13235) provides the means to offer a service and the means to discover services that have been offered. ITU-T Rec. X.950 | ISO/IEC 13235-1 defines an enterprise Specification, an information Specification and a computational Specification of this Trading Function. No engineering Specification is defined in ITU-T Rec. X.950 | ISO/IEC 13235-1. This Recommendation | International Standard describes how the Specifications of the Trading Function in ITU-T Rec. X.950 | ISO/IEC 13235-1 can be engineered using OSI Directory Service (see ITU-T Rec. X.500 | ISO/IEC 9594-1) to store information and to provide support mechanisms. This Specification does not prescribe that a trader must be engineered by using OSI Directory. But if OSI Directory is used, this Specification defines standardised templates for information entries (e.g. service offer and link information objects) in the Directory DIT.

Clause 5 gives an overview of how the Trading Function is implemented as a combination of X.500 DUA and DSA. The X.500 DSA is used to store the Trader Information Object and a Trader DUA (T-DUA) implements the functionality required by a Trader, which is difficult, or impossible, to implement using OSI Directory services.

Clause 6 defines the standardised templates for information entries of the Trader Information Object, the information known to a particular Trader.

Clause 7 describes mapping of Trading Function operations to appropriate Directory operations.

Clause 8 specifies a minimal Type Repository Function necessary to enable the correct functioning of the X.500 Directory for Trading.

Clause 9 describes the mechanisms used to enable the handling of dynamic properties of a Trader's service offers.

This Specification contains two annexes.

Annex A is a normative schema definition of Trader definitions.

Annex B is an informative schema definition of a sample service description.

1 Scope and field of application

This Specification describes how the ODP Trading Function can be realised using information entries and support mechanisms of the OSI Directory. This Specification is to be used in conjunction with the ODP Trading Function Standard (ITU-T Rec. X.950 | ISO/IEC 13235-1). If there are any discrepancies between the prescriptive statements in ITU-T Rec. X.950 | ISO/IEC 13235-1 and those in this Specification, the prescriptive statements in ITU-T Rec. X.950 | ISO/IEC 13235-1 take precedence.

The scope of this Specification is:

• standardised templates for Trading Function information objects in the DIT ;
• descriptions of mapping of Trading Function operations to appropriate Directory operations;
• description of use of other Directory features to provide the support mechanisms for implementing the ODP Trading Function.

This Specification does not prescribe that a trader must be engineered by using OSI Directory. But if OSI Directory is used, this Specification defines standardised templates for information entries (e.g. service offer and link information objects) in the Directory DIT. This Specification does not put any restrictions on where these entries are placed in the Directory DIT. That is, this Specification does not standardise any structure rules. This Specification does describe a mechanism to provide the Trading Function using OSI Directory.

The field of application of this Specification is for the construction of the ODP Trading Function using the OSI Directory, when required.

2 Normative References

The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this 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 Recommendation | International Standard are encouraged to investigate the posibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid Internationa Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations.

2.1 Identical Recommendations | International Standards