1、Reference numberISO/IEC 15938-5:2003(E)ISO/IEC 2003Information technology Multimediacontent description interface Part 5:Multimedia description schemesTechnologies de linformation Interface de description du contenumultimdia Partie 5: Schmas de description multimdiaNational Standard of CanadaCAN/CSA
2、-ISO/IEC 15938-5:04(ISO/IEC 15938-5:2003)International Standard ISO/IEC 15938-5:2003 (first edition, 2003-05-15) has been adopted withoutmodification (IDT) as CSA Standard CAN/CSA-ISO/IEC 15938-5:04, which has been approved as a NationalStandard of Canada by the Standards Council of Canada.ISBN 1-55
3、397-750-5 December 2004The Canadian Standards Association (CSA), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards Council of Canada to the National Standards system in 1973. It is a not-for-profit, nonstatutory, voluntary membership
4、 association engaged in standards development and certification activities. CSA standards reflect a national consensus of producers and users including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and
5、 commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment. Individuals, companies, and associations across Canada indicate their support for CSAs standards developme
6、nt by volunteering their time and skills to CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSAs total membership from which its Directors are chosen. Sustaining me
7、mberships represent a major source of income for CSAs standards development activities. The Association offers certification and testing services in support of and as an extension to its standards development activities. To ensure the integrity of its certification process, the Association regularly
8、 and continually audits and inspects products that bear the CSA Mark. In addition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 1919, the Association has developed the
9、 necessary expertise to meet its corporate mission: CSA is an independent service organization whose mission is to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and
10、international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaThe Standards Council of Canada is the coordinating body of the National Standards system, a federation of independent, autonomous organiz
11、ations working towards the further development and improvement of voluntary standardization in the national interest. The principal objects of the Council are to foster and promote voluntary standardization as a means of advancing the national economy, benefiting the health, safety, and welfare of t
12、he public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international cooperation in the field of standards. A National Standard of Canada is a standard which has been approved by the Standards Council of Canada and one which reflects a reasona
13、ble agreement among the views of a number of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of producers, users, consumers, and others with relevant interests, as may be appropriate to the subject in hand. It normally is a standa
14、rd which is capable of making a significant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a standard conforms to the criteria and procedures established by the Standards Council of Canada. Approval does not refer to the techn
15、ical content of the standard; this remains the continuing responsibility of the accredited standards development organization. Those who have a need to apply standards are encouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore,
16、users are cautioned to obtain the latest edition from the organization preparing the standard.The responsibility for approving National Standards of Canada rests with theStandards Council of Canada270 Albert Street, Suite 200Ottawa, Ontario, K1P 6N7CanadaAlthough the intended primary application of
17、this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 15938-5:04Information technology Multimedia content descriptionint
18、erface Part 5: Multimedia description schemesDecember 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 15938-5:04Information technology Multimedia content description interface Part 5: Multimedia description schemesCSA PrefaceStandards development within the Information Technology sector is
19、harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC
20、), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T).This International Standard was reviewed
21、by the CSA TCIT under the jurisdiction of the Strategic Steering Committee on Information Technology and deemed acceptable for use in Canada. (A committee membership list is available on request from the CSA Project Manager.) From time to time, ISO/IEC may publish addenda, corrigenda, etc. The CSA T
22、CIT will review these documents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Sales representative. This Standard has been formally approved as a National Standard of Canada by the Standards Council of Canada.December
23、 2004 Canadian Standards Association 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Where the words “this International Standard” appear in the text, they shoul
24、d be interpreted as “this National Standard of Canada”.Inquiries regarding this National Standard of Canada should be addressed toCanadian Standards Association5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044www.csa.caICS 35.040 Ref. No. ISO/IEC 15938-5:2
25、003/Cor.1:2004(E) ISO/IEC 2004 All right s reserved Information technology Multimedia content description interface Part 5: Multimedia description schemes TECHNICAL CORRIGENDUM 1 Technologies de linformation Interface de description du contenu multimdia Partie 5: Schmas de description multimdia RECT
26、IFICATIF TECHNIQUE 1 Technic al Cor rigendum 1 to ISO/IEC 15938-5:2003 was prepared by Joint Technic al Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Page 16 Replac e the tex t of 4.3 with: 4.3 Root element 4.3.1
27、 Introduction This subclause specifies the root type and the root element. The root element shall be used as the topmostelement in a description. The root type provides metadata about the description as well as information that is Technical Corrigendum 1:2005 toNational Standard of CanadaCAN/CSA-ISO
28、/IEC 15938-5:04Technical Corrigendum 1:2004 to International Standard ISO/IEC 15938-5:2003 has been adopted withoutmodification (IDT) as Technical Corrigendum 1:2005 to CAN/CSA-ISO/IEC 15938-5:04. This TechnicalCorrigendum was reviewed by the CSA Technical Committee on Information Technology (TCIT)
29、under thejurisdiction of the Strategic Steering Committe on Information Technology and deemed acceptable for use inCanada.October 2005ISO/IEC 15938-5:2003/Cor.1:2004(E) 2 ISO/IEC 2004 All rights reservedcommon to the description, such as the language of the text and the convention for specifying tim
30、e. The root element provides a choice of elements for creating either a complete description or a description unit, which are defined as follows: Complete Description: describes multimedia content using the top-level types. For example, the description of an image is a complete description. Descript
31、ion Unit: describes an instance of a D, DS, or header. A description unit can be used to represent partial information from a complete description. For example, the description of a shape or color is a description unit. Root element syntax ISO/IEC 15938-5:2003/Cor.1:2004(E) ISO/IEC 2004 All rights r
32、eserved 3Root element semantics Semantics of the Mpeg7Type: Name Definition Mpeg7Type The type of the root element. DescriptionProfile Identifies set(s) of constraints or rules that the description syntax and semantics conform to (optional). Includes an indicator of the profile and level to which th
33、e description conforms. The absence of this (optional) element indicates that the description may contain instantiations of any description tool specified in Parts 2, 3, 4 and 5 of ISO/IEC 15938, without constraint. In particular, the absence of this element indicates that the description does not n
34、ecessarily conform to any profile and level specified in ISO/IEC 15938. DescriptionMetadata Describes the metadata for the descriptions contained within the instance of the root type (optional). The description metadata applies to the elements contained within the instance of the root element unless
35、 new description metadata is described for those elements. DescriptionMetadataType is defined in 4.5.3. xml:lang Identifies the language of the textual content in the description (optional). If not specified, the language is unknown. xml:lang is defined in (XML). timePropertyGrp Describes the proper
36、ties of a time line associated with AV content (optional). timePropertyGrp is defined in 6.4.8. mediaTimePropertyGrp Describes the properties of a time line associated with AV media (optional). mediaTimePropertyGrp is defined in 6.4.16. Semantics of DescriptionProfileType: Name Definition Descriptio
37、nProfileType Identifies set(s) of constraints or rules that the description syntax and semantics conform to (optional). Includes an indicator of the profile and level to which the description conforms. profileAndLevelIndication Indicates the profile and level to which the description conforms. Profi
38、les and levels are defined subsets of the syntax and semantics specified in ISO/IEC 15938. The values of this attribute, and the corresponding profiles and levels, are specified in Part 9 of ISO/IEC 15938. Semantics of the Mpeg7 root element: Name Definition Mpeg7 Serves as the root element of the d
39、escription. Mpeg7 shall be used as the topmost element in a description. DescriptionUnit Describes an instance of one of a D, DS, or header (optional). A description unit can be used to represent partial information from a complete description. For example, DescriptionUnit can be used to describe a
40、shape using the RegionShape D(defined in ISO/IEC 15938-3). Description Describes multimedia content using the top-level types (optional). For example, Description can be used to describe an image using ContentEntityType, where MultimediaContent is of type ImageType. Root element examples (informativ
41、e) The following example shows the use of the root element for describing an instance of the ScalableColor D (defined in ISO/IEC 15398-3) using DescriptionUnit. 1.0 ISO/IEC 15938-5:2003/Cor.1:2004(E) 4 ISO/IEC 2004 All rights reserveddescriptionUnitExample 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 The followi
42、ng example shows the use of root element for describing an image using Description. 1.0 1.1 2001-09-20T03:20:25+09:00 098f2470-bae0-11cd-b579-08002b30bfeb completeDescriptionExample Creator Yoshiaki Shibata jp Tokyo 2000-10-10T19:45:00+09:00 Wizzo Extracto ver. 2 RID# ISO/IEC 15938-5:2003/Cor.1:2004
43、(E) ISO/IEC 2004 All rights reserved 5The following example shows the use of root element for signalling that the description conforms to two different levels within a UDP profile. John Johnson Page 111 Replace the following text from 7.3.6.2: ISO/IEC 15938-5:2003/Cor.1:2004(E) 6 ISO/IEC 2004 All ri
44、ghts reservedwith: Page 133 Replace 7.4.6.2 and 7.4.6.3 with: 7.4.6.2 termReference datatype syntax ISO/IEC 15938-5:2003/Cor.1:2004(E) ISO/IEC 2004 All rights reserved 77.4.6.3 termReference datatype semantics Semantics of the termReferenceType: Name Definition termReferenceType Describes a referenc
45、e to a term. The termReferenceType supports two forms for referencing terms: “aliased term references“ (termAliasReferenceType) and URIs (termURIReferenceType). Whether a termReference is determined an alias or URI is determined by whether it satisifies the regular expression given in the pattern fa
46、cet above. Aliased term references are used to reference terms in classification schemes that have been assigned an alias using a ClassificationSchemeAlias. These references have the lexical form “:aliasname:termid“. Note: this form is not a valid URI, which allows the use of aliases to be syntactic
47、ally distinguished from a full URI. An alias must be resolved to a classification scheme alias and converted into a URI for the term reference as follows: Resolve alias. When a term reference is an alias, a corresponding instance of ClassificationSchemeAlias having a value of its alias attribute exa
48、ctly equal to that specified in the termReference shall exist in the description. The alias is said to be resolved to that ClassificationSchemeAlias instance. Compute URI. The value of the termReference URI is defined to be the value of the href attribute of the resolved ClassificationSchemeAlias in
49、stance concatenated with the string “:termid“ from the termReferenceValue. The aliased termReference is then treated as if the URI obtained in the previous step had been used as the value of the termReference. If the termReferences value is a URI, then it shall be a syntactically valid URI. termAliasReferenceType Describes an alias referenced term. termURIReferenceType Describes a URI referenced term. ISO/IEC 15938-5:2003/Cor.1:2004(E) 8 ISO/IEC 2004 All rights reservedPage 254 Replace the following t
