ISO/IEC INTERNATIONAL STANDARD 10027 First edition 1990-06-15 Information technology --- Information Resource Dictionary System (IRDS) framework Technologies de I'information - Cadre pour le gestionnaire de ressources du systeme d'information (IRDS) Reference number ISO/IEC 10027 : 1990 (E) Copyright Intermational Organization for Standardization 'rovided by IHS ense with IS permitted without license from IHS Not for Resale ISO/IEC 10027 : 1990 (E) Table of Contents Page 1 Scope 1 2 Normative References 1 3 Definitions 1 4 Conventions 2 5 The Structure of the IRDS Standards 3 5.1 Purpose of the IRDS Standards 33 5.2 The IRDS family of Standards 5.3 Support for different fields of application 5 5.4 Means of support using Intermational Standards 5 6 IRDS Data Content 5 6.1 Data Levels 555 6.2 Concept of types and instances 6.3 Data Containers 6.4 Identification of Data Levels 6 6.5 Level Pairs 8 6.6 Role of data modelling facilities 9 6.7 Extensibility 10 7 IRDS facilities 10 7.1 Classification of IRDS facilities 10 7.2 General database management facilities 10 7.3 Facilities specific to information resource management 10 8 IRDSInterfaces 11 8.1 Positioning of Interfaces 11 8.2 IRDS Interfaces Overview 12 8.3 Description of Interfaces 12 8.4 Use of IRDS Services by Database services 14 8.5 Export and import of IRDS Data 14 8.6 Remote IRDS Access 14 8.7 Services Provided at Interfaces 15 6 Conformance 15 ? ISO/IEC 1990 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanicai, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland CyrhmatioagizatiStandardzai No repr permitted without license from IHS Not for Resale IS0/IEC 10027 : 1990 (E) Foreword ISO(theInternationalOrganization forStandardization)andIEC(theInternational Electrotechnical Commission) form the specialized system for worldwide standardiz- ation. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75%e of the national bodies casting a vote. International Standard ISO/IEC 10027 was prepared by Technical Committee ISO/IEC JTC 1, Information technology. International Standard ISO/IEC 10027 is one of a series of International Standards on Information Resource Dictionary Systems. ii Copyriaht Intemational Oorganizatinfor Standardization cing permitted without license from IHS Not for Resale