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1、Reference number ISO/TR 14813-6:2000(E) ISO 2000 TECHNICAL REPORT ISO/TR 14813-6 First edition 2000-12-15 Transport information and control systems Reference model architecture(s) for the TICS sector Part 6: Data presentation in ASN.1 Systmes de commande et dinformation des transports Architecture(s
2、) du modle de rfrence du secteur TICS Partie 6: Prsentation de donnes dans ASN.1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitt
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6、he Central Secretariat at the address given below. ISO 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from eithe
7、r 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 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2000 All rights reserved Copyright International O
8、rganization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 14813-6:2000(E) ISO 2000 All rights reservediii Contents Foreword
9、.iv Introductionvi 1Scope1 2Normative references1 3Terms and definitions .2 4Requirements.4 4.1General requirements4 4.2Identification requirements.4 4.3Determining context5 4.4Module definition using ASN.1.5 4.4.1General description.5 4.4.2Module definition.5 Annex A (informative) Simplified contex
10、t negotiation 7 A.1Simplified context negotiation .7 Annex B (informative) Examples .8 B.1Module definition using ASN.1 types8 B.2Module definition using non-ASN.1 types 8 B.3Module definition using both ASN.1 types and non-ASN.1 types9 B.4Encoding examples.10 B.4.1Small integer 10 B.4.2CS210 B.4.3e
11、difactmsg011 Bibliography13 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 14813-6:2000
12、(E) iv ISO 2000 All rights reserved Foreword 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 carried out through ISO technical committees. Each member body i
13、nterested 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 work. ISO collaborates closely with the International Electrotechn
14、ical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards, but in exceptional circumstances a technical committee may propose the publication of a Technical Report of one of the following types: type 1, when
15、the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standa
16、rd; type 3, when a technical committee has collected data of different kind from that which is normally published as an International Standard (“state of the art“, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be
17、transformed into International Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. Technical Reports are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Attention is dr
18、awn to the possibility that some of the elements of this part of ISO TR 14813 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 14813-6, which is a Technical Report of type 2, was prepared by Technical Committee ISO/TC 204, T
19、ransport Information and Control Systems. This document is not to be regarded as an “International Standard”. It is proposed for provisional application so that information and experience of its use in practice may be gathered. Comments on the content of this document should be sent to the ISO Centr
20、al Secretariat. A review of this Technical Report (type 2) will be carried out not later than three years after its publication with the options of: extension for another three years; conversion into an International Standard; or withdrawal. ISO/TR 14813 consists of the following parts, under the ge
21、neral title Transport information and control systems Reference model architecture(s) for the TICS sector: Part 1: TICS fundamental services. This document presents the definition of 32 TICS fundamental services that are the informational products or services or applications areas provided to a TICS
22、 user. Part 2: Core TICS reference architecture. This document describes an abstract object-oriented system architecture based on the TICS fundamental services. ThisdocumentisbeingissuedintheTechnicalReport(type 2)seriesofpublications(accordingto subclause G.3.2.2 of Part 1 of the ISO/IEC Directives
23、, 1995) as a “prospective standard for provisional application” in the field of transport information and control systems because there is an urgent need for guidance on how standards in this field should be used to meet an identified need. Copyright International Organization for Standardization Pr
24、ovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 14813-6:2000(E) ISO 2000 All rights reservedv Part 3: Example elaboration. This document refines th
25、e core TICS reference architecture (part 2) with some emphasis on traffic management. Part 4: Reference model tutorial. This document describes the basic terms, graphical representations and modelling views exploited in the object-oriented definition of the architecture development of parts 2 and 3.
26、 Part 5: Requirements for architecture description in TICS standards. This document describes the terminology and form to be used when documenting or referencing aspects of architecture description in TICS standards. Part 6: Data presentation in ASN.1. This document establishes the use of ASN.1 as t
27、he normal syntax notation to be used in standards for the TICS sector and a common message form for such ASN.1 based data elements. Annexes A and B of this part of ISO/TR 14813 are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO L
28、icensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 14813-6:2000(E) vi ISO 2000 All rights reserved Introduction This Technical Report was developed by ISO TC204 WG1, Systems Architecture,
29、Taxonomy and Terminology. It is one of a series of documents to provide a form and structure to the Reference Architecture for the Transport Information and Control Systems (TICS). Specifically in this document, a determination for the use and elaboration of Abstract Syntax Notation One (ASN.1) is p
30、rovided, and in particular, the specification of a standardised interpretation and use of the ASN.1 defined in ISO/IEC 8824-1 through ISO/IEC 8824-4. This document has been developed as one of several to make effective the decision of the ISO Technical Committee 204 (TC204) to adopt ASN.1 as its nor
31、mal syntax notation, and to provide instructions and rules to facilitate interoperability and mobility of data. The use of ASN.1 data element constructs is now widely accepted and adopted by many Technical Committees and Working Groups of ISO and CEN. ISO TC204 has resolved that ASN.1 shall be the n
32、ormal syntax notation used in syntax and encoding rule elaboration in Standards in the TICS sector. ASN.1 and its encoding rules provide a means of achieving interoperability of otherwise incompatible data elements. In order to achieve this, levels of identification are required to precede certain d
33、ata elements, to enable the comprehension of data messages. Excluding transfers in a pre-defined context, the first level of identification required in an ASN.1 message identifies the context of the message. This document determines that, in the TICS Sector, this is achieved by using an OBJECT IDENT
34、IFIER which shall be determined in accordance with an arc as specified in Annex B of ISO/IEC 9834-1. The objective of this document is therefore to establish a basis where the message can always be identified simply by reference to the relevant Standard and without the requirement of central registr
35、ation authorities (except where those are specifically required in the referenced Standard). A later document in this series will collate a generic standard data dictionary for the TICS sector from the Standards determined in the Sector. This will provide a reference work for the sector, to provide
36、for situations where data elements/primitives determined in one Standard are to be used within another Standard, and to avoid duplication and minimise the number of definitions in use in the sector. Copyright International Organization for Standardization Provided by IHS under license with ISO Licen
37、see=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- TECHNICAL REPORTISO/TR 14813-6:2000(E) ISO 2000 All rights reserved1 Transport information and control systems Reference model architecture(s) for t
38、he TICS sector Part 6: Data presentation in ASN.1 1 Scope 1.1 This document establishes the requirement that ASN.1 shall be the normal syntax notation to be used in Standards in the TICS Sector, and to provide a common message form for such ASN.1 based data elements, such that reference to the relev
39、ant TICS ISO Standard may be achieved. This Standard provides guidance as to the usage of ASN.1 within the TICS Sector, and makes provision for other extant Standardised syntax notations (such as EDIFACT). 1.2 This document is designed to provide an enabling structure for use in the TICS/RTTT sector
40、. It enables users of ASN.1 structures to reference specific Standards wherein specific data messages (and their syntax notation) are determined. The use of a Standard form of notation is designed to allow interoperability between different commercial systems, and to allow migration of data to other
41、 systems, and to later generations of systems. 1.3 This standard notation provides methods of identification of the relevant Standard in which a TICS message, expressed in ASN.1 notation, is described, and thereby enables understanding and interpretation of the message. 1.4 Vision statement. This do
42、cument envisions a low overhead and minimum maintenance means of identifying the Standard of all ASN.1 message structures in an interoperable environment within the TICS Sector. 1.5 Mission statement. This document is to provide guidance to identify the relevant Standard wherein a particular ASN.1 m
43、essage may be understood and used. 1.6 This document is procedural in nature affecting data presentation in ASN.1. As such it is concerned only with data architecture, and the whole content of the document falls into this category. Consideration of other architectural aspects as such, are therefore
44、not appropriate in this document. 1.7 Specific implementation requirements, other than those determined in the syntax notations identified above, are beyond the scope of this document. This document also provides a means where particular sector requirements, or existent Standards, that require parti
45、cular message forms that have traditionally been expressed in other notations (e.g. EDIFACT), may be referenced, with the purpose of actual usage from a TICS Sector application. Thus it presents an unambiguous system for identifying all the different data types that, in such a way that it may easily
46、 be interpreted to/from other notations where appropriate. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO/TR 14813. For dated references, subsequent amendments to, or revisions of, any of th
47、ese publications do not apply. However, parties to agreements based on this part of ISO/TR 14813 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referre
48、d to applies. Members of ISO and IEC maintain registers of currently valid International Standards. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 14813-6:2000(E) 2 ISO 2000 All rights reserved ISO/IEC 8824-1:1998, Information technology Abstract Syntax Notation One (ASN.1) Specification of basic no