BS ISO BRITISH STANDARD AEROSPACE SERIES 21962:2003 Space data and information transfer systems Data entity dictionary specification language (DEDSL) - PVL syntax ICS 49.140 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO21962:2003 National foreword This British Standard reproduces verbatim IS0 21962:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ACE/68,Space systemsandoperations,toSubcommitteeACE/86/-/7,Space data and information transfer systems, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled "International Standards Correspondence Index", or by using the“Search” facility of the BsI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and ii, a blank page, pages 1 to 73 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 24June2003 Amendments issued sincepublication @ BSI 24 June 2003 Amd. No. Date Comments ISBN 058042107 4 BS IS0 21962:2003 ISO INTERNATIONAL STANDARD 21962 First edition 2003-03-15 Space data and information transfer systems Data entity dictionary specification language (DEDSL) - PVL syntax Systemes de transfert des informations et données spatiales Langage de spécification pour le dictionnaire d'entites de donnees- SyntaxePVL Reference number ISO 21962:2003(E) ISO BS IS0 21962:2003 ii BSIS021962:2003 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 technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by atleast 75%of thememberbodies castinga 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 rights. International Standard IsO 21962 was prepared by the Consultative Committee for Space Data Systems Clause 2 of this International Standard)by Technical Committee ISO/TC 20, Aircraft and space vehicles, SubcommitteeSc13,Spacedataand informationtransfersystems. ii BSIS021962:2003 Space data and information transfer systems - Data entity dictionary specification languages (DEDSL) PVL syntax 1 Scope This International Standard specifies the requirements for establishing a parameter value language (PVL) to be used in the creation of a data entity dictionary (DED) The scop