1、Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard.Date of ANSI Approval: 12/30/2003Published by American National Standards Institute,25 West 43rd Street, New York, New York 10036Copyright 2003 by Information Technology Industry Council
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3、his publication may be reproduced in any form, including an electronic retrieval system, withoutthe prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaReference numberISO
4、/IEC 11179-3:2003(E)ISO/IEC 2003INTERNATIONAL STANDARD ISO/IEC11179-3Second edition2003-02-15Information technology Metadata registries (MDR) Part 3: Registry metamodel and basic attributes Technologies de linformation Registres de mtadonnes (MDR) Partie 3: Mtamodle de registre et attributs de base
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8、ress given below. ISO/IEC 2003 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 ISO at the address below or
9、 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 2003 All rights reservedISO/IEC 11179-3:2003(E) ISO/IEC 2003 All rights r
10、eserved iiiContents Page Foreword vi Introduction vii 1 Scope 1 1.1 Scope Structure of a Metadata Registry 1 1.2 Scope Basic attributes of metadata items. 2 1.3 Scope Aspects not currently addressed .2 1.4 Areas of Applicability . 2 2 Normative references . 2 3 Definitions 3 3.1 Definitions of Metam
11、odel Constructs . 3 3.2 Broad Terms used in this part of ISO/IEC 11179 . 5 3.3 Alphabetical list of metadata objects in the metamodel. 8 3.4 List of Abbreviations 27 4 Structure of a Metadata Registry. 27 4.1 Metamodel for a Metadata Registry 27 4.2 Application of the metamodel 28 4.3 Specification
12、of the metamodel. 28 4.4 Types, Instances and Values . 29 4.5 Extensibility . 29 4.6 Date References 29 4.7 Description of metamodel 29 4.8 Administration and Identification region 32 4.9 Naming and Definition Region. 38 4.10 Classification Region 41 4.11 Data Element Concept Region. 43 4.12 Concept
13、ual and Value Domain Region . 45 4.13 Data Element Region 49 4.14 Consolidated Metamodel 53 5 Basic attributes . 55 5.1 Use of basic attributes 55 5.2 Common attributes . 55 5.3 Attributes specific to Data Element Concepts. 57 5.4 Attributes specific to Data Elements 58 5.5 Attributes specific to Co
14、nceptual Domains . 58 5.6 Attributes specific to Value Domains . 58 5.7 Attributes specific to Permissible Values 58 5.8 Attributes specific to Value Meanings 59 6 Conformance . 59 6.1 Degree of Conformance . 59 6.2 Levels of Conformance 60 6.3 Obligation. 60 6.4 Conformance to prior editions of thi
15、s Standard 60 6.5 Implementation Conformance Statement (ICS) . 61 6.6 Roles and Responsibilities for Registration 61 Annex A (informative) Alphabetical List of Terms 62 ISO/IEC 11179-3:2003(E) iv ISO/IEC 2003 All rights reservedAnnex B (informative) Modelling Notation .65 B.1 Modelling symbols 65 An
16、nex C (informative) Mapping the ISO/IEC 11179-3:1994 basic attributes to the ISO/IEC 11179-3:2002 metamodel and basic attributes69 C.1 Introduction69 C.2 Mapping the Basic Attributes.72 Bibliography99 ISO/IEC 11179-3:2003(E) ISO/IEC 2003 All rights reserved vTable of Figures Figure 1 Common faciliti
17、es for all Administered Items 30 Figure 2 Types of Administered Items. 31 Figure 3 High-level metamodel 32 Figure 4 Administration and identification metamodel region . 33 Figure 5 Administration and identification region Classes used as Composite Datatypes 33 Figure 6 Naming and Definition metamode
18、l region. 38 Figure 7 Classification metamodel region . 41 Figure 8 Data Element Concept metamodel region 43 Figure 9 Conceptual and value domain metamodel region. 46 Figure 10 Data Element metamodel region. 51 Figure 11 Consolidated metamodel 54 Figure B.1 Sample modelling diagram 65 Figure B.2 Not
19、ation for “Class” 65 Figure B.3 Notation for “Association” 66 Figure B.4 Notation for relationship between Classes 66 Figure B.5 Notation for relationship with Cardinality . 66 Figure B.6 Notation for “Association Class” 66 Figure B.7 Notation for Supertype / Subtypes. 67 Figure B.8 Notation for Agg
20、regation 67 Figure B.9 Notation for Composite Aggregation 68 Figure B.10 Notation for Class with Attributes. 68 Figure B.11 Notation for Composite attributes 68 Figure C.1 Basic Attributes of Data elements . 69 ISO/IEC 11179-3:2003(E) vi ISO/IEC 2003 All rights reservedForeword ISO (the Internationa
21、l 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 International Standards through technical committees established by
22、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
23、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, Part 2. The main task of technical committees is to prepare International Standards. Draft International
24、Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the s
25、ubject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 11179-3 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 32, Data management and interchange. This second edition cancels and repl
26、aces the first edition (ISO/IEC 11179-3:1994), which has been technically revised. ISO/IEC 11179 (first edition) consists of the following parts, under the general title Information technology Specification and standardization of data elements: Part 1: Framework for the specification and standardiza
27、tion of data elements Part 2: Classification for data elements Part 3: Registry metamodel and basic attributes Part 4: Rules and guidelines for the formulation of data definitions Part 5: Naming and identification principles for data elements Part 6: Registration of data elements NOTE ISO/IEC 11179
28、is currently being revised under the general title Information technology Metadata registries (MDR). The part titles may also change in the process. ISO/IEC 11179-3:2003(E) ISO/IEC 2003 All rights reserved viiIntroduction Data processing and electronic data interchange rely heavily on accurate, reli
29、able, controllable and verifiable data recorded in databases. A prerequisite for correct and proper use and interpretation of data is that both users and owners of data have a common understanding of the meaning and representation of the data. To facilitate this common understanding, a number of cha
30、racteristics, or attributes, of the data have to be defined. These characteristics of data are known as “metadata”, that is, “data that describes data”. This part of ISO/IEC 11179 provides for the attributes of data elements and associated metadata to be specified and registered as metadata items in
31、 a Metadata Registry. The structure of a Metadata Registry is specified in the form of a conceptual data model. The Metadata Registry is used to keep information about data elements and associated concepts, such as “data element concepts”, “conceptual domains” and “value domains”. Generically, these
32、 are all referred to as “metadata items”. Such metadata are necessary to clearly describe, record, analyse, classify and administer data. When considering data and metadata, it is important to distinguish between types of data/metadata, and instances of these types. Clause 4 of this part of ISO/IEC
33、11179 specifies the types of metadata objects that form the structure of a Metadata Registry. A Metadata Registry will be populated with instances of these metadata objects (metadata items), which in turn define types of data, e.g. in an application database. In other words, instances of metadata sp
34、ecify types of application level data. In turn, the application database will be populated by the real world data as instances of those defined data types. NOTE ISO/IEC 10027:1990 IRDS Framework explains the concepts of different levels of modelling. This part of ISO/IEC 11179 also describes the bas
35、ic attributes of metadata items for purposes where a complete Metadata Registry is not appropriate. This part of ISO/IEC 11179 is of interest to information developers, information managers, data administrators, standards developers and others who are responsible for making data understandable and s
36、hareable. ISO/IEC 11179 has broad applicability across subject area domains and information technologies. INTERNATIONAL STANDARD ISO/IEC 11179-3:2003(E) ISO/IEC 2003 All rights reserved 1Information technology Metadata registries (MDR) Part 3: Registry metamodel and basic attributes 1 Scope The prim
37、ary purpose of ISO/IEC 11179-3 is to specify the structure of a Metadata Registry (see 1.1). ISO/IEC 11179-3 also specifies basic attributes which are required to describe metadata items, and which may be used in situations where a complete metadata registry is not appropriate (e.g. in the specifica
38、tion of other International Standards) (see 1.2). 1.3 identifies aspects not currently addressed. 1.4 provides examples of activities where ISO/IEC 11179-3 may be applied. 1.1 Scope Structure of a Metadata Registry A comprehensive Metadata Registry management function requires a set of rules and pro
39、cedures. These rules and procedures are set out in the following Clauses and Annexes and are complemented elsewhere in this document as follows: a) the definitions of metadata objects are in Clause 3.3 of this part of ISO/IEC 11179; b) the structure of the registry in the form of a conceptual data m
40、odel is in Clause 4 of this part of ISO/IEC 11179; Aspects of the registry are expanded on in other parts of ISO/IEC 11179, as follows: a) the overall framework for this family of International Standards is specified in ISO/IEC 11179-1; b) rules and guidelines for classifying metadata are in ISO/IEC
41、 11179-2; c) rules and guidelines for the formulation of definitions are in ISO/IEC 11179-4; d) naming and identifying principles for metadata are in ISO/IEC 11179-5; e) rules and guidelines for registering metadata are in ISO/IEC 11179-6. While the model diagrams are presented in UML notation, this
42、 part of ISO/IEC 11179 does not assume nor endorse any specific system environment, database management system, database design paradigm, system development methodology, data definition language, command language, system interface, user interface, computing platform, or any technology required for i
43、mplementation. This part of ISO/IEC 11179 does not directly apply to the actual use of data in communications and information processing systems. ISO/IEC 11179-3:2003(E) 2 ISO/IEC 2003 All rights reserved1.2 Scope Basic attributes of metadata items This part of ISO/IEC 11179 also specifies basic att
44、ributes which are required to describe metadata items, and which may be used in situations where a complete Metadata Registry is not appropriate (e.g. in the specification of other International Standards). These basic attributes are described in Clause 5. 1.3 Scope Aspects not currently addressed T
45、his part of ISO/IEC 11179 does not currently support the following requirements; a) Complex data structures, encapsulation, stereotyping and inheritance; b) Ability to enforce uniqueness of names within a Context; c) Specification of Naming Conventions for a Context; d) Designations other than names
46、 (e.g. icons); e) Specification of Time in addition to Date; f) Prescribed conceptual domains and value domains for the attributes in the metamodel; g) Registration of XML documents or XML schemas; h) Application Programming Interfaces (APIs) and associated bindings to access a registry; i) Multilin
47、gual support, except for names and definitions; j) Cultural adaptability. It is anticipated that some or all of these requirements will be addressed in future editions of this part of ISO/IEC 11179, or in companion standards or technical reports. 1.4 Areas of Applicability This part of ISO/IEC 11179
48、 applies to activities including: a) the definition, specification and contents of metadata registries, including interchanging or referencing among various collections of data elements; b) the design and specification of application-oriented data models, databases and message types for data interch
49、ange; c) the actual use of data in communications and information processing systems; d) interchange or reference among various collections of metadata. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 31-0, Quantities and units Part 0
