ISO/TS TECHNICAL SPECIFICATION 24620-1 First edition 2015-03-15 Language resource management Controlled natural language (CNL) - Part 1: Basic concepts and principles Gestion des ressources linguistiques-Langage naturel controle (CNL) - Partie 1:Notions de base et principes Reference number IS0/TS24620-1:2015(E) TSO @IS02015 IS0/TS24620-1:2015(E) COPYRIGHTPROTECTEDDOCUMENT ISO2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211 Geneva 20 Tel. + 4122 749 01 11 Fax +41 22 749 09 47 E-mail copyright@iso.org Webwww.iso.org Published in Switzerland ii @ IS0 2015 - All rights reserved IS0/TS24620-1:2015(E) Contents Page Foreword ..iv Introduction. 1 Scope. .1 2 Terms and definitions 3 General view of controlled natural language ..4 3.1 Overview.. .4 3.2 Properties of controlled natural languages .4 3.3 Controllednaturallanguagescomparedwith natural languages .5 3.4 .5 Controlled natural languages compared with special-purpose languages 3.5 Criteriaofadequacy. .5 4 Benefits and usages of controlled natural language .6 4.1 Applications of controlled natural language .6 4.2 Users of controlled natural language. .6 4.3 Benefits of controlled natural language .6 5 Levels of restricting controlled natural languages .7 5.1 Overview 7 5.2 Linguistic levels .7 5.3 Extra-linguisticlevels .7 5.4 Classification of controlled natural languages .7 6 Generalprinciplesofcontrolled natural language .7 6.1 Twoviewpoints of principles forcontrollednatural language .7 6.2 Different orientations for the principles of controlled natural language .7 7 Concluding remarks .8 Bibliography 9 @ IS0 2015 -All rights reserved iii