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1、BRITISH STANDARD BS ISO/IEC 9545:1994 Implementation of ISO/IEC 9545:1994 Information technology Open Systems Interconnection Application Layer structure Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9545:1994 This British Stand
2、ard, having been prepared under the direction of the Information Systems Technology Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 February 1995 BSI 01-2000 First published October 1990 Second edition February 1995 The following BSI r
3、eferences relate to the work on this standard: Committee reference IST/21 Draft for comment 92/68026 DC ISBN 0 580 23713 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-)
4、to Technical Committee IST/21, upon which the following bodies were represented: British Computer Society British Telecommunications plc CCTA (the Government Centre for Information Systems) Department of Trade and Industry IT Standards Unit (Itd6a) Digital Equipment Co. Ltd. IBM United Kingdom Ltd.
5、International Computers Limited Joint Information Systems Committee Level 7 Ltd. Logica UK Ltd. Ministry of Defence National Computing Centre Ltd. National Health Services Nine Tiles Computer Systems Ltd. X Open Company Ltd. PSC International Ltd. Rank Xerox Ltd. SEMA Group Systems Ltd. Salford Soft
6、ware Services (3-5) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9545:1994 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii Forewor
7、diii Text of ISO/IEC 95451 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9545:1994 ii BSI 01-2000 National foreword This British Standard reproduces verbatim ISO/IEC 9545:1994 and implements it as the UK national standard. It su
8、persedes BS ISO 9545:1989 which is withdrawn. This British Standard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/21 has the responsibility to: aid enquirers to understand the text; present to the responsible internati
9、onal committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Service
10、s, BSI, 389 Chiswick High Road, London, W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obliga
11、tions. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO/IEC title page, pages ii to iv, pages 1 to 16 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the am
12、endment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 9545:1994(E) ii BSI 01-2000 Contents
13、Page Forewordiii Introduction1 1Scope1 2Normative references2 2.1Identical Recommendations|International Standards2 2.2Paired Recommendations|International Standards equivalent in technical content2 3Definitions2 4Abbreviations4 5Application Layer concepts4 5.1Introduction4 5.2Application-processes5
14、 5.3Application-entities5 5.4Application-service-objects5 5.5Application-service-elements6 5.6Control functions6 5.7ASO-associations7 5.8ASO-context8 5.9ASO naming9 5.10 Application-associations9 5.11 Application-context9 5.12 Names and directory functions10 6Operation of application-entity-invocati
15、ons10 6.1Use of application-associations10 6.2Operation of ASO-invocations and ASE-invocations10 6.3Interaction with the supporting service11 6.4Interaction with the Presentation Layer11 6.5Error recovery and ASO-association11 7Application Layer specifications11 7.1Categories of specification11 7.2R
16、elationships among specifications12 7.3Properties of specifications12 8Abstract syntax definition13 9Registration requirements14 Annex A Some aspects of combining ASEs and ASOs15 Annex B Relationship between application-contexts and application profiles16 Annex C Relationship of the terms of this ed
17、ition and the previous edition of ISO/IEC 954516 Table 19 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 9545:1994(E) BSI 01-2000iii Foreword ISO (the International Organization for Standardization) and IEC (the International Electr
18、otechnical 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 technic
19、al 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 technica
20、l 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 9545 was
21、prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, in collaboration with ITU-T. The identical text is published as ITU-T X.207. This second edition cancels and replaces the first edition (ISO/IEC 9545:1989), which has been technically revised. Annex A, Annex B and Annex C o
22、f this International Standard are for information only. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 9545:1994(E)
23、BSI 01-20001 Introduction This Recommendation|International Standard is a refinement of the description of the OSI Application Layer contained in ITU-T Rec. X.200|ISO/IEC 7498-1. The purpose of this Recommendation|International Standard is to facilitate a coherent and modular approach to Application
24、 Layer standardization. It defines a set of architectural principles and concepts that provide a basis for structuring and relating the specifications contained in Application Layer Recommendations and Standards. It defines the internal structure of the Application Layer, providing a framework for t
25、he development of Application Layer Recommendations and Standards. It also describes the general principles underlying the operation of application-protocols. The following subjects are covered by this Recommendation|International Standard: a) the relationship between distributed information process
26、ing and OSI communication services; b) the structure of application-entities; c) the OSI-service and protocol structure in the Application Layer; and d) ASO-context and application-context. This Recommendation|International Standard only considers those aspects of distributed information processing
27、for an application which are relevant for the derivation of generic requirements for the structuring of Application Layer communications. The architectural framework specified in this Recommendation|International Standard embodies concepts that may not be fully supported by existing Application Laye
28、r Recommendations and Standards. However, these concepts have been specified so as to provide a basis for the development of future Application Layer Recommendations and Standards which, it is anticipated, will require their use. This Recommendation|International Standard may be subject to future ex
29、pansion, particularly with regard to multi-peer communication, security, application-context management, recovery, and Open Distributed Processing. A companion Technical Report, which is currently under development, will provide guidance on applying this Application Layer Structure during the creati
30、on of Application Layer service and protocol Recommendations and Standards. 1 Scope This Recommendation|International Standard refines the description of the Application Layer contained in the Basic Reference Model for OSI (ITU-T Rec. X.200|ISO/IEC 7498-1). It provides a framework for coordinating t
31、he development of existing and future Application Layer Recommendations and Standards. It is provided for reference by Application Layer Recommendations and Standards. In particular this Recommendation|International Standard: a) defines the nature of Recommendations and Standards in the Application
32、Layer and the relationships among them; b) defines the architectural framework in which individual OSI Application Layer protocols are developed. c) defines concepts which provide a flexible approach to structuring in the Application Layer; d) defines the categories of identifiable objects which are
33、 necessary for the specification and operation of protocols; e) relates distributed information processing activities to the Recommendations and Standards in the Application Layer; f) structures, and relates, specifications in Application Layer Recommendations and Standards; g) identifies the variou
34、s kinds of specification necessary in Application Layer Recommendations and Standards. This Recommendation|International Standard is provided for reference by Application Layer Recommendations and Standards. Its purpose is to facilitate a coherent and modular approach to the structuring of specifica
35、tions for Application Layer behaviour. It neither specifies services nor protocols for OSI; nor is it an implementation specification for systems, nor a basis for appraising the conformance of implementations. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontroll
36、ed Copy, (c) BSI ISO/IEC 9545:1994(E) 2 BSI 01-2000 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
37、 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 possibility of applying the most recent editions of the Recommendations and Standards listed below. Member
38、s of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations|International Standards ITU-T Recommendation X.200 (1994)| ISO/IEC 7498-1:1
39、994, Information technology Open Systems Interconnection Basic Reference Model1). ITU-T Recommendation X.210 (1993)| ISO/IEC 10731:1993, Information technology Open Systems Interconnection Conventions for the Definition of OSI services. CCITT Recommendation X.660 (1992)| ISO/IEC 9834-1:1993, Informa
40、tion technology Open Systems Interconnection Procedures for the operation of OSI Registration Authorities: General Procedures. 2.2 Paired Recommendations|International Standards equivalent in technical content CCITT Recommendation X.217 (1992), Service definition for the Association Control Service
41、Element. ISO 8649:1989, Information technology Open Systems Interconnection Service Definition for the Association Control Service Element. CCITT Recommendation X.216 (1988), Presentation service definition for Open Systems Interconnection for CCITT applications. ISO 8822:1988, Information processin
42、g systems Open Systems Interconnection Connection oriented presentation service definition. CCITT Recommendation X.650 (1992), Open Systems Interconnection (OSI) Reference Model for naming and addressing. ISO 7498-3:1989, Information processing systems Open Systems Interconnection Basic Reference Mo
43、del: Naming and Addressing. 3 Definitions 3.1 For the purposes of this Recommendation|International Standard, the following terms as defined in ITU-T Rec. X.200|ISO/IEC 7498-1 apply: a) abstract syntax; b) application-entity; c) application-process; d) application-process-invocation; e) application-
44、process-type; f) (N)-address; g) (N)-association; h) (N)-entity; i) (N)-entity-invocation; j) (N)-entity-type; k) (N)-function; l) (N)-layer; m) (N)-protocol; n) (N)-protocol-control-information; o) (N)-protocol-data-unit; p) (N)-service-access-point; q) presentation context; r) real open system; an
45、d s) transfer syntax. 3.2 For the purposes of this Recommendation|International Standard, the following terms as defined in CCITT Rec. X.650|ISO 7498-3 apply: a) AEI-identifier; b) AE-qualifier; c) AE-title; d) AE-type-title; e) AP-invocation-identifier; f) application-association-identifier; g) AP-
46、title; h) (N)-directory-function; and i) (N)-protocol-addressing-information. 3.3 For the purposes of this Recommendation|International Standard, the following terms as defined in ITU-T Rec. X.210|ISO/IEC 10731 apply: a) deliver (primitive); b) OSI-service; c) OSI-service primitive; d) OSI-service-u
47、ser; and e) submit (primitive). 1) Presently at the stage of draft. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 01:35:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 9545:1994(E) BSI 01-20003 3.4 For the purposes of this Recommendation|International Standard, the following definitio
48、ns apply. NOTEThe word “object” is used here in the general English sense. 3.4.1 AE-invocation a specific utilization of part or all of the capabilities of a given application-entity in support of the communications requirements of an application-process-invocation NOTEThis is a specific use of the
49、ASO-invocation concept. 3.4.2 AE-type a description of a class of application-entities in terms of a set of capabilities defined for the Application Layer NOTEThis is a specific use of the ASO-type concept. 3.4.3 application-association, association a cooperative relationship between two ASO-invocations which governs their bilateral use of the Presentation Service for communication of information and coordination of their joint operation NOTEThis is a specific use of the ASO-association concept. 3.4.4 application-association-ident
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