ISO/IEC INTERNATIONAL STANDARD 30112 First edition 2020-09 Information technology Specification methods for cultural conventions Technologies de I'information - Méthodes de specification des conventions culturelles Reference number IEC IS0/IEC 30112:2020(E) Copyright International Organization for Standardization @IS0/IEC 2020 IS0/IEC 30112:2020(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2020 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 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: +41 22 749 01 11 Email: [email protected] Website:www.iso.org Published in Switzerland Copyigh ileratinal Organizationfor Standardization @ IS0/IEC 2020 - All rights reserved IS0/IEC 30112:2020(E) Contents Page Foreword. Introduction 1 Scope 2 Normative references.. 3 Terms and definitions. 3.1 Bytes and characters. 3.2 Cultural and other major concepts. 3.3 FDCC-related categories .... 4 Notations.. 4.1 Notation for defining syntax. 4.2 Portable character set... 5 FDCC-set. 5.1 General. 5.2 FDCC-set description.. 5.2.1 General... 5.2.2 Character representation. 5.2.3 Continuation of lines... 5.2.4 Names for copy keyword 5.2.5 Pre-category statements. 5.3 LC_IDENTIFICATION... 5.4 LC_CTYPE... 5.4.1 General 12 5.4.2 Character classification keywords.. 5.4.3 Character string transliteration.. 17 5.4.4"i18n"LC_CTYPE category... 17 5.5 LC_COLLATE 42 5.5.1 General.. 42 5.5.2( Collation statements 44 5.5.3 "copy" keyword... 46 5.5.4 "coll_weight_max" keyword. 46 5.5.5 "section-symbol"keyword 47 5.5.6 "collating-element" keyword. 47 5.5.7 "collating-symbol" keyword.. 47 5.5.8 "symbol-equivalence"keyword 48 5.5.9 "order_start" keyword 48 5.5.10 "order_end"keyword.. 49 5.5.11 "reorder.after" keyword... 49 5.5.12 "reorder-end" keyword.. 50 5.5.13 "section"keyword.. 50 5.5.14 "reorder-section-after"keyword. 5.6 LC_MONETARY 53 5.7 LC_NUMERIC. 57 5.8 LC_TIME. 58 5.8.1 General 58 CopyrightInternational OrgzISQ6EG202n- All rights reserved iii IS0/IEC 30112:2020(E) 5.8.2 Date field descriptors. 62 5.8.3 Modified field descriptors 63 5.8.4"i18n"LC_TIME category... 64 5.9 LC_MESSAGES. 65 5.10 LC_XLITERATE 65 5.10.1 General 65 5.10.2 Transliteration statements.. 66 5.10.3 "include" keyword... 67 5.10.4 Example of use of transliteration... 67 5.11 LC_NAME. 68 5.12 LC_ADDRESS. 69 5.13 LC_TELEPHONE. 72 5.14 LC_PAPER... 73 5.15 LC_MEASUREMENT 5.16 LC_KEYBOARD 74 6 CHARMAP .74 6.1 General. 74 6.2 Character Set Description Text. 7 Repertoiremap. .79 8Functionality 117 8.1 General.. .117 8.2 The "strpcoll" function.... 117 8.3 The "setmedia" function. 118 8.4 String, encoding, repertoire and locale data types . .118 8.4.1 General.... 118 8.4.2 String data type... 118 8.4.3 Encoding data type .. 8.4.4 Repertoire data type ... 8.4.5 Locale data type.. 121 8.4.6 Character handling . 123 8.4.7 String comparison.... 8.4.8 Message formatting... 125 8.4.9 Conversion between string and other data types. .127 8.4.10 Utilities.. 131 9 Messages format ..133 AnnexA(informative)DifferencesfromISO/IEC/IEEE9945.... ..134 Annex B (informative) Rationale ... 136 Annex C (informative) BNF grammar.. 149 Annex D (informative) Relation to taxonomy. 155 Annex E (informative) Implementation in glibc.... Annex (iftormatie) Relelation betwen categories and keywords, and APIs... 159 Annex G (informative) Bindings guidelines 160 Copyrightinational Organization for Standardization @ IS0/IEC 2020 - All rights reserved IS0/IEC30112:2020(E) Foreword ISo (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of IsO or IEC participate in the development of Internatio