1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 20022-8:2013Financial services Universalfinancial industry messageschemePart 8: ASN.1 generationBS ISO 20022-8:2013 BRITISH STANDARDNational forewordThis British Standard
2、is the UK implementation of ISO 20022-8:2013.The UK participation in its preparation was entrusted to TechnicalCommittee IST/12, Financial services.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the ne
3、cessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 70962 3ICS 03.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was p
4、ublished under the authority of theStandards Policy and Strategy Committee on 31 May 2013.Amendments issued since publicationDate Text affectedBS ISO 20022-8:2013Reference numberISO 20022-8:2013(E)ISO 2013INTERNATIONAL STANDARD ISO20022-8First edition2013-05-01Financial services Universal financial
5、industry message scheme Part 8: ASN.1 generation Services financiers Schma universel de messages pour lindustrie financire Partie 8: Gnration ASN.1 BS ISO 20022-8:2013ISO 20022-8:2013(E) COPYRIGHT PROTECTED DOCUMENT ISO 2013 All rights reserved. Unless otherwise specified, no part of this publicatio
6、n may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20
7、Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2013 All rights reservedBS ISO 20022-8:2013ISO 20022-8:2013(E) ISO 2013 All rights reserved iiiContents Page Foreword iv Introduction vi 1 Scope 1 2 Normative references 1 3 Terms and
8、 definitions . 1 4 Background 1 5 ISO 20022 transformation rules for MessageSet . 3 5.1 Registration and Repository 3 5.2 Preconditions . 3 5.3 Transformation constraints 3 5.4 Module Header . 3 5.4.1 General . 3 5.4.2 Module Name . 3 5.4.3 Module identification . 4 5.4.4 Definition of the tagging e
9、nvironment 4 5.4.5 Definition of the extensibility environment . 4 5.5 Granularity of Modules . 4 5.6 Encoding Messages 4 5.6.1 Encoding 4 5.7 Completeness 5 5.8 Method 5 5.8.1 General . 5 5.8.2 Relationship between metamodel concepts and ASN.1 artefacts . 5 5.8.3 ISO 20022 DataType transformation t
10、o ASN.1 . 11 Bibliography 25 BS ISO 20022-8:2013ISO 20022-8:2013(E) iv ISO 2013 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally c
11、arried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the wor
12、k. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Inter
13、national Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of th
14、e elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20022-8 was prepared by Technical Committee ISO/TC 68, Financial services. ISO 20022 consists of the following parts, under the general title Financia
15、l services Universal financial industry message scheme: Part 1: Metamodel Part 2: UML profile Part 3: Modelling Part 4: XML Schema generation Part 5: Reverse engineering Part 6: Message transport characteristics Part 7: Registration Part 8: ASN.1 generation ISO 20022-1:2013, ISO 20022-2:2013, ISO 20
16、022-3:2013, ISO 20022-4:2013, ISO 20022-5:2013, ISO 20022-6:2013, ISO 20022-7:2013 and ISO 20022-8:2013 will be implemented by the Registration Authority by no later than the end of May 2013, at which time support for the concepts set out within them will be effective. Users and potential users of t
17、he ISO 20022 series are encouraged to familiarize themselves with the 2013 editions as soon as possible, in order to understand their impact and take advantage of their content as soon as they are implemented by the Registration Authority. For further guidance, please contact the Registration Author
18、ity. BS ISO 20022-8:2013ISO 20022-8:2013(E) ISO 2013 All rights reserved vFor the purposes of research on financial industry message standards, users are encouraged to share their views on ISO 20022:2013 and their priorities for changes to future editions of the document. Click on the link below to
19、take part in the online survey: http:/ BS ISO 20022-8:2013ISO 20022-8:2013(E) vi ISO 2013 All rights reservedIntroduction This International Standard defines a scalable, methodical process to ensure consistent descriptions of messages throughout the financial services industry. The purpose of this I
20、nternational Standard is to describe precisely and completely the externally observable aspects of financial services messaging in a way that can be verified independently against operational messaging. The trigger for the creation of this International Standard was the rapid growth in the scale and
21、 sophistication of messaging within financial services during the 1990s using ISO 15022. The financial services industry (from here on referred to as “the industry“) created the first version of this International Standard as the successor to ISO 15022 in response to that trigger. Since ISO 15022, t
22、he industry has broadened the scope from securities to the entire industry for this International Standard. This International Standard is based on open technology standards, which historically have evolved more rapidly than the industry itself. Consequently, this International Standard adopted a mo
23、del-driven approach where the model of the industrys messaging can evolve separately from the evolution of the messaging technology standards. The period during which this International Standard has emerged followed the widespread adoption of the World Wide Web (the Web) for business. XML (eXtensibl
24、e Mark-up Language) emerged as the de facto standard for document representation on the Web and it became the first syntax for ISO 20022. The modelling process is further refined into three levels which, in addition to the messaging technology standard, is why this International Standard is based on
25、 four levels: the Scope level, the Conceptual level, the Logical level and the Physical level. This four-level approach is based on the first four levels of the Zachman Framework. The remaining two levels of the Zachman Framework are equivalent to the implementations and the operational levels, resp
26、ectively. In ISO 20022-1, the first, second and third levels are described in UML (Unified Modelling Language) because it is widely supported and supports multiple levels of abstraction. The models created in accordance with this International Standard are technology independent in that they do not
27、require any particular physical expression or implementation. Such models aim to describe all parts of the message exchange. The models form the definition of the protocol between participants exchanging messages. This International Standard defines a method that describes a process by which these m
28、odels can be created and maintained by the modellers. The models and the Physical level artefacts are stored in a central repository, serviced by a Registration Authority. This International Standards repository is available on the World Wide Web and offers public access for browsing. The Repository
29、 is organized into two areas: A DataDictionary containing the industry model elements likely to have further or repeated use. A BusinessProcessCatalogue that contains models describing specific message definitions and business processes, and physical syntax implementations. This International Standa
30、rd is organized into the following parts. ISO 20022-1 describes in MOF (Meta-Object Facility) the metamodel of all the models and the Repository. BS ISO 20022-8:2013ISO 20022-8:2013(E) ISO 2013 All rights reserved vii ISO 20022-2 covers the UML profile, a grounding of general UML into a specific sub
31、set defined for this International Standard (to be used when UML is selected to define the models). ISO 20022-3 describes a modelling method to produce models for this International Standard. ISO 20022-4 covers XML schema generation rules to transform a Logical level model into a Physical level desc
32、ription in the syntaxes. ISO 20022-5 covers logical model alignment and reverse engineering of existing message syntaxes. ISO 20022-6 covers message transport characteristics that define the quality of service required by the business process definitions so that they can operate successfully. ISO 20
33、022-7 describes the process of managing the registration of models and physical syntax implementations. This part of ISO 20022 gives ASN.1 syntax generation rules to transform a Logical level model into a Physical level description in ASN.1. BS ISO 20022-8:2013BS ISO 20022-8:2013INTERNATIONAL STANDA
34、RD ISO 20022-8:2013(E) ISO 2013 All rights reserved 1Financial services Universal financial industry message scheme Part 8: ASN.1 generation 1 Scope This part of ISO 20022 describes the transformation rules to generate ASN.1 abstract syntax from an ISO 20022 compliant MessageDefinition. The generate
35、d abstract syntax is for the description and validation of Messages. The transformation rules are a transformation from Level 3 to Level 4. It is a deterministic transformation, meaning that the resulting ASN.1 is completely predictable for a given MessageDefinition. There is neither manual input to
36、 the transformation itself nor manual adjustment to the result of the transformation. This part of ISO 20022 is the ASN.1 equivalent of ISO 20022-4. In ISO 20022-4 the abstract syntax generated is XML Schema; in this part of ISO 20022 it is ASN.1. In ISO 20022-4 the only encoding supported is UTF-8
37、XML; in this part there are multiple encodings supported for ASN.1. These include all the standard encodings, but in addition the ability to register custom encodings in ECN. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated r
38、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 8825-5:2008, Information technology ASN.1 encoding rules: Mapping W3C XML schema definitions into ASN.1 Part 5 ISO 20022-1, Financial services
39、Universal financial industry message scheme Part 1: Metamodel W3C Recommendation: XML Schema Part 2: Datatypes Second Edition, (28 October 2004) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 20022-1 apply. NOTE Within ASN.1 notation, XSD refers to
40、the XSD Module defined by ISO/IEC 8825-5. 4 Background Abstract Syntax Notation One (ASN.1) is an International Standard and flexible notation that describes data structures for representing, encoding, transmitting and decoding data. It provides a set of rules for describing BS ISO 20022-8:2013ISO 2
41、0022-8:2013(E) 2 ISO 2013 All rights reservedthe structure of objects that are independent of machine-specific encoding techniques and it is a precise, formal notation that removes ambiguities. ASN.1 is a joint ISO/IEC and ITU-T standard, originally defined in 1984 as part of CCITT X.409:1984. ASN.1
42、 constituted its own standard, X.208, in 1988 due to wide applicability. The substantially revised 1995 version is covered by the X.680 series. The current version is backward compatible with the 1995 version. ISO/IEC 8824 covers the ASN.1 abstract syntax; ISO/IEC 8825 covers encodings for the ASN.1
43、 abstract syntax. The abstract syntax is roughly analogous to XML Schema, and the encodings roughly analogous to XML. The XML Schema Definition Language (XSD) Recommendation is written in terms of the XML Recommendation, which makes substituting XML for a different encoding impractical. XSD effectiv
44、ely limits the encoding to XML. Parts 1 to 5 of ISO 20022-5 published in 2004 use only one syntax, XML Schema, and only one encoding, UTF-8 encoded XML. Support for ASN.1 has been added to ISO 20022 in order to support scenarios in which its syntax and encodings are more suitable. It is up to users
45、of this International Standard to decide for which scenarios ASN.1 is suitable. The consensus that led to the inclusion of ASN.1 was a history of its usage in messaging, good support, and a reputation for small and fast to parse messages. Encoding Control Notation had been identified as a way to sup
46、port existing encodings within 20022 without compromising the abstract syntax. The addition of multiple encodings to ISO 20022 gives up wire level compatibility in return for broadening the domain in which ISO 20022 can standardize the Business Process and Message Definitions. The Messages remain sy
47、ntactically compatible, which is less than wire-level compatible and more than semantically compatible. In practice, we expect an ISO 20022 Messaging Library to be identical for encodings based on ASN.1 and XSD. ASN.1 may be used as a schema language for XML. The generated ASN.1 Abstract Syntax will
48、 contain XER tags to guide the encoding as XML. An XML Message will be equivalent, whether encoded from the ISO 20022 XSD or the ISO 20022 ASN.1 Abstract Syntax. For any Message expressed in ASN.1, when encoded to XML using XER, will produce an XML Message that is valid against the XSD for the same
49、Message Definition. It should not matter whether the XML is produced using the XSD or ASN.1 as the ASN.1 Abstract Syntax and XSD are equivalent through their XML being compatible; the design of the ASN.1 is limited to features and design idioms with a direct equivalent in XSD. The scopes of an ASN.1 Module and an XSD Schema namespace are equivalent. The ASN.1 generation takes a single parameter as input, which is a MessageSet. The output of the generation
