ISO INTERNATIONAL STANDARD 7168-1 First edition 1999-07-01 Air quality Exchange of data Part 1: General data format Qualité de I'air Echange de données - Partie 1: Format géneral de données ISO Reference number ISO 7168-1:1999(E) ISO 7168-1:1999(E) Contents Page 1 Scope 2 Normative references 3 Terms and definitions 2 4 Symbols and abbreviated terms .. 5 File format... 2 5.1Overview 5.2 Construction of data files 6 Specifications.. 6.1 Creation of file names 6.2 Construction of level descriptors and keywords .. 11 6.3 Definition of level descriptors and keywords . .11 6.4 Presentation of data . .29 Annex A (normative) 7-bit coded character set .... ..32 Annex B (normative) Measurand codes. ..33 Annex C (normative) Presentation of latitude, longitude and altitude data. .39 Annex D (informative) Examples of country short names and codes .. Annex E (informative) Examples of data files. 42 Bibliography. .49 @ISO1999 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 the publisher. International Organization for Standardization Casepostale56·CH-1211Geneve20·Switzerland [email protected] Printed in Switzerland @ ISO ISO 7168-1:1999(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO memberbodies).The workofpreparingInternationalStandardsis normallycarried outthroughISOtechnica 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(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the IsO/lEC Directives, Part 3 Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7168-1 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 4, General aspects. Iso 7168 consists of the following parts, under the general title Air quality - Exchange of data Part 1: Generaldataformat Part 2: Condensed data format The first editions of the several parts of isO 7168 together cancel and replace the first edition (isO 7168:1985) which has been technically revised. Annexes A, B and C form a normative part of this part of ISO 7168. Annexes D and E are for information only. ili