1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 15889:2011Space data and informationtransfer systems The datadescription language EASTspecificationBS ISO 15889:2011 BRITISH STANDARDNational forewordThis British Standard
2、 is the UK implementation of ISO 15889:2011. Itsupersedes BS ISO 15889:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/68/-/7, Space systems and operations - Space dataand information transfer systems.A list of organizations represented on this
3、 committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 74129 6ICS 49.140Compliance with a British Standard cannot confer immunity fromlegal
4、obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2011.Amendments issued since publicationDate Text affectedBS ISO 15889:2011Reference numberISO 15889:2011(E)ISO 2011INTERNATIONAL STANDARD ISO15889Third edition2011-10-15Sp
5、ace data and information transfer systems The data description language EAST specification Systmes de transfert des informations et donnes spatiales Spcification du langage de description de donnes EAST BS ISO 15889:2011ISO 15889:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unl
6、ess 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 either ISO at the address below or ISOs member body in the country of the requester. ISO
7、copyright office Case postale 56 CH-1211 Geneva 20 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 2011 All rights reservedBS ISO 15889:2011ISO 15889:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organizat
8、ion 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 interested in a subject for which a technical committee has been established h
9、as 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Int
10、ernational 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 International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Public
11、ation 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 the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent ri
12、ghts. This third edition cancels and replaces the second edition (ISO 15889:2003), which has been technically revised. ISO 15889 was prepared by the Consultative Committee for Space Data Systems (CCSDS) as CCSDS 644.0-B-3, June 2010 and was adopted without modifications except those stated in Clause
13、 2 of this International Standard by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 13, Space data and information transfer systems. BS ISO 15889:2011BS ISO 15889:2011INTERNATIONAL STANDARD ISO 15889:2011(E) ISO 2011 All rights reserved 1Space data and information transf
14、er systems The data description language EAST specification 1 Scope This International Standard defines the Enhanced Ada SubseT (EAST) language used to create descriptions of data called Data Description Records (DDRs). Such DDRs ensure a complete and exact understanding of the data and allow it to
15、be interpreted in an automated fashion. This means that a software tool is able to analyse a DDR and interpret the format of the associated data. This allows the software to extract values from the data on any host machine (i.e. on a different machine from the one that produced the data). The scope
16、and field of application are furthermore detailed in subclauses 1.1 and 1.2 of the enclosed CCSDS publication. 2 Requirements Requirements are the technical recommendations made in the following publication (reproduced on the following pages), which is adopted as an International Standard: CCSDS 644
17、.0-B-3, June 2010, The data description language EAST specification. For the purposes of international standardization, the modifications outlined below shall apply to the specific clauses and paragraphs of publication CCSDS 644.0-B-3. Pages i to vi This part is information which is relevant to the
18、CCSDS publication only. Page 1-5 Add the following information to the reference indicated: 1 ISO 8859-1:1987 has been withdrawn and replaced by ISO/IEC 8859-1:1998. 2 ISO/IEC 10646-1:1993 has been withdrawn and has been replaced by ISO/IEC 10646:2011. Page E-1 Add the following information to the re
19、ference indicated: E2 Document CCSDS 620.0-B-2, May 1992, is equivalent to ISO 12175:1994. 3 Revision of publication CCSDS 644.0-B-3 It has been agreed with the Consultative Committee for Space Data Systems that Subcommittee ISO/TC 20/SC 13 will be consulted in the event of any revision or amendment
20、 of publication CCSDS 644.0-B-3. To this end, NASA will act as a liaison body between CCSDS and ISO. BS ISO 15889:2011ISO 15889:2011(E) 2 ISO 2011 All rights reserved(Blank page) BS ISO 15889:2011ISO 15889:2011(E) ISO 2011 All rights reserved 3Recommendation for Space Data System Standards THE DATA
21、DESCRIPTION LANGUAGE EAST SPECIFICATION (CCSD0010) RECOMMENDED STANDARD CCSDS 644.0-B-3 BLUE BOOK June 2010 BS ISO 15889:2011ISO 15889:2011(E) 4 ISO 2011 All rights reserved(Blank page) BS ISO 15889:2011ISO 15889:2011(E) ISO 2011 All rights reserved 5CCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION
22、 CCSDS 644.0-B-3 Page i June 2010 AUTHORITY Issue: Recommended Standard, Issue 3 Date: June 2010 Location: Washington, DC, USA This document has been approved for publication by the Management Council of the Consultative Committee for Space Data Systems (CCSDS) and represents the consensus technical
23、 agreement of the participating CCSDS Member Agencies. The procedure for review and authorization of CCSDS Recommendations is detailed in the Procedures Manual for the Consultative Committee for Space Data Systems, and the record of Agency participation in the authorization of this document can be o
24、btained from the CCSDS Secretariat at the address below. This document is published and maintained by: CCSDS Secretariat Space Communications and Navigation Office, 7L70 Space Operations Mission Directorate NASA Headquarters Washington, DC 20546-0001, USA BS ISO 15889:2011ISO 15889:2011(E) 6 ISO 201
25、1 All rights reservedCCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION CCSDS 644.0-B-3 Page ii June 2010 STATEMENT OF INTENT The Consultative Committee for Space Data Systems (CCSDS) is an organization officially established by the management of its members. The Committee meets periodically to addre
26、ss data systems problems that are common to all participants, and to formulate sound technical solutions to these problems. Inasmuch as participation in the CCSDS is completely voluntary, the results of Committee actions are termed Recommended Standards and are not considered binding on any Agency.
27、This Recommended Standard is issued by, and represents the consensus of, the CCSDS members. Endorsement of this Recommendation is entirely voluntary. Endorsement, however, indicates the following understandings: o Whenever a member establishes a CCSDS-related standard, this standard will be in accor
28、d with the relevant Recommended Standard. Establishing such a standard does not preclude other provisions which a member may develop. o Whenever a member establishes a CCSDS-related standard, that member will provide other CCSDS members with the following information: - The standard itself. - The an
29、ticipated date of initial operational capability. - The anticipated duration of operational service. o Specific service arrangements shall be made via memoranda of agreement. Neither this Recommended Standard nor any ensuing standard is a substitute for a memorandum of agreement. No later than five
30、years from its date of issuance, this Recommended Standard will be reviewed by the CCSDS to determine whether it should: (1) remain in effect without change; (2) be changed to reflect the impact of new technologies, new requirements, or new directions; or (3) be retired or canceled. In those instanc
31、es when a new version of a Recommended Standard is issued, existing CCSDS-related member standards and implementations are not negated or deemed to be non-CCSDS compatible. It is the responsibility of each member to determine when such standards or implementations are to be modified. Each member is,
32、 however, strongly encouraged to direct planning for its new standards and implementations towards the later version of the Recommended Standard. BS ISO 15889:2011ISO 15889:2011(E) ISO 2011 All rights reserved 7CCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION CCSDS 644.0-B-3 Page iii June 2010 FORE
33、WORD Through the process of normal evolution, it is expected that expansion, deletion, or modification of this document may occur. This Recommended Standard is therefore subject to CCSDS document management and change control procedures, which are defined in the Procedures Manual for the Consultativ
34、e Committee for Space Data Systems. Current versions of CCSDS documents are maintained at the CCSDS Web site: http:/www.ccsds.org/ Questions relating to the contents or status of this document should be addressed to the CCSDS Secretariat at the address indicated on page i. BS ISO 15889:2011ISO 15889
35、:2011(E) 8 ISO 2011 All rights reservedCCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION CCSDS 644.0-B-3 Page iv June 2010 At time of publication, the active Member and Observer Agencies of the CCSDS were: Member Agencies Agenzia Spaziale Italiana (ASI)/Italy. Canadian Space Agency (CSA)/Canada. Cen
36、tre National dEtudes Spatiales (CNES)/France. China National Space Administration (CNSA)/Peoples Republic of China. Deutsches Zentrum fr Luft- und Raumfahrt e.V. (DLR)/Germany. European Space Agency (ESA)/Europe. Instituto Nacional de Pesquisas Espaciais (INPE)/Brazil. Japan Aerospace Exploration Ag
37、ency (JAXA)/Japan. National Aeronautics and Space Administration (NASA)/USA. Russian Federal Space Agency (RFSA)/Russian Federation. UK Space Agency/United Kingdom. Observer Agencies Austrian Space Agency (ASA)/Austria. Belgian Federal Science Policy Office (BFSPO)/Belgium. Central Research Institut
38、e of Machine Building (TsNIIMash)/Russian Federation. Centro Tecnico Aeroespacial (CTA)/Brazil. Chinese Academy of Sciences (CAS)/China. Chinese Academy of Space Technology (CAST)/China. Commonwealth Scientific and Industrial Research Organization (CSIRO)/Australia. CSIR Satellite Applications Centr
39、e (CSIR)/Republic of South Africa. Danish National Space Center (DNSC)/Denmark. European Organization for the Exploitation of Meteorological Satellites (EUMETSAT)/Europe. European Telecommunications Satellite Organization (EUTELSAT)/Europe. Geo-Informatics and Space Technology Development Agency (GI
40、STDA)/Thailand. Hellenic National Space Committee (HNSC)/Greece. Indian Space Research Organization (ISRO)/India. Institute of Space Research (IKI)/Russian Federation. KFKI Research Institute for Particle b) the word should implies an optional, but desirable, specification; c) the word may implies a
41、n optional specification; d) the words is, are, and will imply statements of fact. BS ISO 15889:2011ISO 15889:2011(E) ISO 2011 All rights reserved 17CCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION CCSDS 644.0-B-3 Page 1-3 June 2010 1.5.3 CONVENTIONS This document uses syntax diagrams to illustrate
42、 the syntax of the EAST constructs. Components of a construct are called elements. The following conventions are used: a) Elements that are presented in bold characters in a circle are reserved keywords, delimiters, or literals. b) The item named on the left of the := symbol is the item being define
43、d. c) The diagram on the right of the := symbol is the corresponding definition. d) A vertical branch represents a choice. e) A repetition is indicated by a loop-back covering the object to be repeated. f) If the name of any syntactic category starts with an italicized part, it is equivalent to the
44、category name without the italicized part. The italicized part is intended to convey some semantic information. For example, an Integer Identifier is an Identifier; i.e., the definition of the category Identifier applies, but the reader has additional semantic information (it is an integer). The fol
45、lowing example (figure 1-1) presents a diagram specifying the declaration of Item A. Item A is defined as first a keyword (type), then followed by an italicized Item B (already defined, and known as Item B), then followed by a keyword (is) and a delimiter (). Then this structure is followed by a cho
46、ice between Items B and C. The choice may be repeated any number of times, each time a delimiter (,) is inserted. The structure is ended by two delimiters () and ;). := type is );,(Item ADeclarationItalicizedItem BItem CItem BFigure 1-1: Example of Syntax Diagram BS ISO 15889:2011ISO 15889:2011(E) 1
47、8 ISO 2011 All rights reservedCCSDS RECOMMENDED STANDARD FOR EAST SPECIFICATION CCSDS 644.0-B-3 Page 1-4 June 2010 The syntax of the language is described using a simple variant of Backus-Naur-Form with the following conventions: a) Boldface words are used to denote reserved keywords. b) Square brac
48、kets enclose optional items. c) Braces enclose a repeated item. This item may appear zero or more times. d) A vertical bar separates alternative items unless it occurs immediately after an opening brace (): in this case it represents the character vertical bar. e) If the name of any syntactic catego
49、ry starts with an italicized part, it is equivalent to the category name without the italicized part. The italicized part is intended to convey some semantic information. This facility used for the BNF intends to assimilate every element like to the previously defined element . The following example presents the definition of Item A using a simple variant of BNF. Item A is defined as first a keyword (type), then followed by an
