INTERNATIONAL ISO/IEC STANDARD 21838-1 First edition 2021-08 Information technology - Top-level ontologies (TLO) - Part 1: Requirements Referencenumber TEC IS0/IEC 21838-1:2021(E) [so @IS0/IEC2021 IS0/IEC 21838-1:2021(E) COPYRIGHT PROTECTED DOCUMENT IS0/IEC2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Email: copyright@iso.org Website:www.iso.org Published in Switzerland i @ IS0/IEC 2021 - All rights reserved