ISO INTERNATIONAL STANDARD 18668-1 First edition 2016-04-01 Traditional Chinese medicine : Coding system for Chinese medicines Part 1: Coding rules for Chinese medicines Medecine traditionnelle chinoise - Systeme de codage des medecines chinoises- Partie 1: Regles de codage des médecines chinoises Reference number IS0 18668-1:2016(E) ISO International Organization for Standardization ZHEJIANG INST OF STANDARDIZATION C1 5956617 @ IS0 2016 ed without license from IHS IS0 18668-1:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair PrganizationforStandardization nsee-ZHEJIANG INSTOF STANDARDIZAoSQ6- All rights reserved etworking permitted without license from IHS IS0 18668-1:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions .1 4 Coding principles 2 4.1 Uniqueness .2 4.2 Scientific integrity 1.2 4.3 Scalability 2 4.4 Compatibility .2 4.5 Stability 2 5 Coding technology .2 5.1 Technical basis 2 5.1.1 Layer 1 2 5.1.2 Layer 2 .3 5.1.3 Layer 3 3 5.1.4 Layer 4 3 5.1.5 Layer 5 .3 5.1.6 Layer 6 .3 5.1.7 Layer 7 ..4 5.1.8 Layer 8 .4 5.1.9 Layer 9 5.1.10 Layer10 4 5.2 Structure. 5.3 Detaileddescription ..5 Annex A (normative) Code table of layer 4 to layer 9 1 Annex B (normative) Calculation of check digit ..17 Annex C (informative) Examples. ..18 Bibliography .22 ii see=ZHEJIANG INST OF STANDARDIZATION C15956617 ed without license from IHS Not for Resale, 2016/6/2 08:55:5