1、 INCITS/ISO/IEC TR 20943-3:2004 2015 (ISO/IEC TR 20943-3:2004, IDT) Information technology - Procedures for achieving metadata registry content consistency - Part 3: Value domains (Technical Report) INCITS/ISO/IEC TR 20943-3:2004 2015 PDF disclaimer This PDF file may contain embedded typefaces. In a
2、ccordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe
3、s licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for p
4、rinting. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Registered by INCITS (InterNational Committee for Information Technolog
5、y Standards) as an American National Standard. Date of Registration: 11/1/2015 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2015 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyri
6、ght claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an el
7、ectronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Washington DC 20005. Printed in the United States of America ii ITIC 2015 All rights reserved Reference numberISO/IEC TR 20943-3:2
8、004(E)ISO/IEC 2004TECHNICAL REPORT ISO/IECTR20943-3First edition2004-03-01Information technology Procedures for achieving metadata registry content consistency Part 3: Value domains Technologies de linformation Procdures pour raliser la consistance du contenu de lenregistrement des mtadonnes Partie
9、3: Domaines de valeur ISO/IEC TR 20943-3:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer p
10、erforming the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create thi
11、s PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Centr
12、al Secretariat at the address given below. ISO/IEC 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IS
13、O at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2004 All rights reservedISO/IEC TR 20943-3:2004(
14、E) ISO/IEC 2004 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 1.1 Background . 1 1.2 Purpose 1 1.3 Limits of this Technical Report . 1 1.4 Registration approach value domains and data elements. 1 2 Normative references . 1 3 Terms and definitions. 2 4 Understanding value
15、domains. 2 4.1 Introduction . 2 4.2 General principles. 3 4.2.1 Introduction . 3 4.2.2 Choice of codes 4 4.2.3 Number of permissible values. 4 4.2.4 Conceptual domain hierarchies 4 4.2.5 Sharing value meanings across permissible values. 5 4.2.6 Sharing value domains across data elements. 5 4.2.7 Ass
16、ociating value domains with concepts (data element concepts and conceptual domains) 5 4.2.8 Value domains not associated with data elements .6 4.2.9 Contrasting conceptual domains and data element concepts. 6 4.2.10 Non-enumerated value domains . 6 4.2.11 Value domains with enumerated and non-enumer
17、ated components 7 4.2.12 Semantic restriction of use of value domains . 8 4.2.13 Rapidly changing enumerated value domains (UPC example) 8 4.3 Structure in value domains 9 4.3.1 Introduction . 9 4.3.2 International Standard Industrial Classification (ISIC) 9 4.3.3 Logical Observation Identifiers Nam
18、es and Codes (LOINC) 11 4.4 Code sets as value domains 12 4.5 Classification schemes as value domains . 13 4.6 Data types and value domains 15 4.6.1 Basics. 15 4.6.2 Value domains with more than one data type limitations of value meaning . 15 4.7 Units of measure . 16 4.8 Dimensionality. 18 4.9 Clas
19、sifying value domains. 19 5 Registering value domains 20 5.1 Introduction . 20 5.2 Rules for registering value domains. 20 5.3 Strategies. 23 5.4 Examples 23 5.4.1 Enumerated value domain . 24 5.4.2 Non-enumerated value domain . 30 Annex A Metamodel for value domains and conceptual domains . 33 Bibl
20、iography . 35 ISO/IEC TR 20943-3:2004(E) iv ISO/IEC 2004 All rights reservedForeword 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
21、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, go
22、vernmental 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives,
23、 Part 2. The main task of the joint technical committee is to prepare International Standards. 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 % of the natio
24、nal bodies casting a vote. In exceptional circumstances, the joint technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; typ
25、e 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type 3, when the joint technical committee has collected data of a different kind from that which is normally publi
26、shed as an International Standard (“state of the art”, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into International Standards. Technical Reports of type 3 do not necessarily have to be reviewed
27、until the data they provide are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC TR 20943-
28、2, which is a Technical Report of type 3, was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 32, Data management and interchange. ISO/IEC 20943 consists of the following parts, under the general title Information technology Procedures for achieving metad
29、ata registry content consistency: Part 1: Data elements Technical Report Part 3: Value domains Technical Report The following parts are under preparation: Part 2: XML structured data Part 4: Overview ISO/IEC TR 20943-3:2004(E) ISO/IEC 2004 All rights reserved vIntroduction The exchange of metadata b
30、etween metadata registries based on ISO/IEC 11179, Information technology Metadata registries (all parts), depends not only on registry software that conforms to the standard, but also on metadata contents that are comparable between registries. While the standard has provisions for data specificati
31、on and registration, there are pragmatic issues pertaining to populating the registries with content. Based on the experiences of organizations that are implementing the standard, technical reports to explore content issues will help current and future users. Metadata registries can be used to regis
32、ter data elements, value domains, other objects, and associated attributes for many kinds of organizational data resource collections. Metadata registries can store information describing value domains used to specify the allowed values of a data element, the codes in a standard list, and classifica
33、tion schemes. This technical report is based on ISO/IEC 11179-3:2003 of the six-part ISO/IEC 11179 International Standard that describes the organization of a registry for managing the semantics of data. The standard specifies the structure of a registry in the form of a conceptual model. The concep
34、tual model is not intended to be a logical or physical data model for a computer system. ISO/IEC 11179-3:2003, models a value domain and an associated conceptual domain. Conceptualization and articulation of rules and relationships are needed in the creation of conceptual domains and value domains.
35、Reuse of value domains should be enabled and regularized. Elementarily equivalent domains have a relationship between their values that needs to be captured in a metadata registry. Some conceptually equivalent domains have relationships between their values, too. These also need to be captured. This
36、 Technical Report describes how this can be accomplished. While metadata registries can be used for storing information about a variety of metadata items, this Technical Report addresses only value domains, conceptual domains, and their associated attributes and relationships. The goal of this paper
37、 is to ensure that there is a common understanding of the content of the value domain attributes so that metadata can be shared between registries, despite their differences. TECHNICAL REPORT ISO/IEC TR 20943-3:2004(E) ISO/IEC 2004 All rights reserved 1Information technology Procedures for achieving
38、 metadata registry content consistency Part 3: Value domains 1 Scope 1.1 Background An ISO/IEC 11179 metadata registry (MDR) is a tool for the management of shareable data; a comprehensive, authoritative source of reference information about data. It supports the standardization and harmonization pr
39、ocesses by recording and disseminating descriptions of data, which facilitates data sharing among organizations and users. It provides links to documents that refer to specific data elements, value domains, and classification schemes and to information systems where those objects are used. When used
40、 in conjunction with a database, the registry enables users to understand any information obtained from the database better. A registry does not contain data itself. It contains the metadata that is necessary to clearly describe, inventory, analyse, and classify data. It provides an understanding of
41、 the meaning, representation, and identification of units of data. This International Standard identifies the information elements that need to be available for determining the meaning of data to be shared between systems. 1.2 Purpose The purpose of this Technical Report is to describe a set of proc
42、edures for the consistent registration of value domains and their attributes in a registry. This Technical Report is not a data entry manual, but a users guide for conceptualizing a value domain and its components for the purpose of consistently establishing good quality metadata. An organization ma
43、y adapt and/or add to these procedures as necessary. 1.3 Limits of this Technical Report The scope of this Technical Report is limited to value domains, conceptual domains, and their associated attributes and relationships. Examples are used throughout the TR to illustrate the concepts described. 1.
44、4 Registration approach value domains and data elements There is a choice when registering value domains in an MDR. Some Registration Authorities treat these sets as value domains, and others treat them as data elements. For the purposes of this Technical Report, the choice will always be to treat t
45、he sets as value domains unless explicitly stated. This choice is made to help illustrate the way to register many different kinds of value domains. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the editio
46、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC TR 20943-3:2004(E) 2 ISO/IEC 2004 All rights reservedISO/IEC 11179-1, Information technology Metadata registries (MDR) Part 1: Framework for the specification and standa
47、rdization of data elements ISO/IEC 11179-2, Information technology Specification and standardization of data elements Part 2: Classification for data elements ISO/IEC 11179-3, Information technology Metadata registries Part 3: Registry metamodel and basic attributes ISO/IEC 11179-4, Information tech
48、nology Metadata registries (MDR) Part 4: Rules and guidelines for the formulation of data definitions ISO/IEC 11179-5, Information technology Specification and standardization of data elements Part 5: Naming and identification principles for data elements ISO/IEC 11179-6, Information technology Meta
49、data registries (MDR) Part 6: Registration of data elements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 11179 and the following apply. 3.1 conceptually equivalent domains value domains that represent the same conceptual domain 3.2 elementarily equivalent domains domains that are elementarily equivalent if there exists a one-to-one corresponden
