1、 Reference numberISO/IEC 21000-3:2003/Amd.1:2007(E)ISO/IEC 2007Information technology Multimedia framework (MPEG-21) Part 3: Digital Item Identification AMENDMENT 1: Related identifier types Technologies de linformation Cadre multimdia (MPEG-21) Partie 3: Identification des lments numriques AMENDEME
2、NT 1: Types didentificateurs lis International Organization for Standardization (ISO), 2007. All rights reserved. International Electrotechnical Commission (IEC), 2007. All rights reserved. NOT FOR RESALE. Amendment 1:2007 toNational Standard of CanadaCAN/CSA-ISO/IEC 21000-3:04Amendment 1:2007 to In
3、te rnational Standard ISO/IEC 21000-3:2003 has been adopted withoutmodification (IDT) as Amendment 1:2007 to CAN/CSA-ISO/IEC 21000-3:04. This Amendment was reviewedby the CSA Technical Committee on Information Technology (TCIT) under the jurisdiction of the StrategicSteering Committee on Information
4、 Technology and deemed acceptable for use in Canada.August2007ISO/IEC 21000-3:2003/Amd.1:2007(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
5、 are licensed to and installed on the computer performing 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. Det
6、ails 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 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
7、relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2007 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 microfi
8、lm, without permission in writing from either ISO 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.orgii ISO/IEC 2007 All rights reservedAm
9、endment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/Amd.1:2007(E) ISO/IEC 2007 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standard
10、s is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take
11、part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is t
12、o prepare International Standards. Draft International 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
13、that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Amendment 1 to ISO/IEC 21000-3:2006 was prepared by Technical Committee ISO/IEC/TC JTC 1, Information technology, Subcommittee SC 29, Codin
14、g of audio, picture, multimedia and hypermedia information. This Amendment provides the ability to express the relationship between different identifiers in the context of MPEG-21 Digital Items and contains information on how to deal with varying levels of functional granularity with respect to the
15、identification of Digital Items. The Amendment also updates information on ISO 15706-2 (ISAN), which has recently been approved as an International Standard. Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/Amd.1:2007(E) ISO/IEC 2007 All
16、rights reserved 1Information technology Multimedia framework (MPEG-21) Part 3: Digital Item Identification AMENDMENT 3: Related identifier types In Clause 1, insert new bullet between the 2nd and 3rd bullet with the following text: How to express the relationship between the two above identifiers; H
17、ow to deal with varying levels of functional granularity for Digital Item identifiers; Replace the entire text of subclause 1.1 with the following text: This specification contains five Clauses and five Annexes: The remainder of this Clause 1 contains an overview of MPEG-21 Digital Items and the rel
18、ation between parts 2 and 3 of ISO/IEC 21000. Clauses 2 and 3 contain normative references and a list of applicable terms and definitions. Clause 4 specifies how to uniquely identify Digital Items, how to associate related identifiers with Digital Items and how to identify different types of Digital
19、 Items. Clause 5 then specifies how to associate metadata with Digital Items by using description scheme identifiers. Annex A contains criteria that need to be fulfilled by a Registration Authority that is required for the identification of Digital Items and their parts as specified in ISO/IEC 21000
20、-3. Annex B contains an example of how to resolve a unique identifier to appropriate metadata. Annex C contains a list of existing identification schemes that can be used by this specification. Annex D provides an approach to dealing with varying functional granularities for identifying Digital Item
21、s. Finally, Annex E contains information of patent statements relating to ISO/IEC 21000-3. While Annex A is normative, Annexes B, C, D and E are informative. In Clause 2, insert the following reference: ISO/IEC 21000-6, Information technology Multimedia framework (MPEG-21) Rights Data Dictionary In
22、subclause 3.1, insert definition for the term “Functional Granularity” as follows: The principle of Functional Granularity states that it shall be possible to uniquely identify a Digital Item whenever it needs to be distinguished from another Digital Item. Functional Granularity of identification ca
23、n differ from User to User. In subclause 3.1, insert definition for the term “Relator” as follows: A term that describes the relationship between two entities. NOTE This definition is equivalent to the definition in ISO/IEC 21000-6. Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/A
24、md.1:2007(E) 2 ISO/IEC 2007 All rights reservedReplace the entire text of subclause 4.2 with the following text: 4.2 RelatedIdentifier Element While the Identifier element is intended to enable the unique identification of Digital Items (or parts thereof), the RelatedIdentifier element conveys ident
25、ification information that is related to the Digital Item (or parts thereof) which may be required by certain Users. This relationship is expressed through the use of Relators as defined in ISO/IEC 21000-6. One example of this is the identification of an abstraction of the work (e.g. composition use
26、d when creating a sound recording). 4.2.1 Syntax 4.2.2 Semantics The RelatedIdentifier element allows associating identifiers that are related to the Digital Item, container, component, and/or fragment thereof but do not directly identify the Digital Item (or part thereof). The value shall be in the
27、 form of a URI. A Registration Authority is set up for maintaining a list of identification schemes to be used within ISO/IEC 21000-3. Requirements for the Registration Authority can be found in Annex A of ISO/IEC 21000-3. Values of the RelatedIdentifier element are not required to be registered wit
28、h the Registration Authority to be conformant to Clause 4.2 of ISO/IEC 21000-3. The RelatedIdentifier element shall not be used for identifying the Digital Item (or part thereof) itself. This shall be done using the Identifier element. The relationshipType attribute enables expressing the relationsh
29、ip of the Resource identified by a RelatedIdentifier to the Digital Item (or part thereof) bearing the RelatedIdentifier. The value shall be in the form of a URI. A Relator shall be identified with a URI of the form urn:mpeg:mpeg21:2002:01-RDD-NS:x, as specified in ISO/IEC 21000-6. 4.2.3 Example See
30、 Figure 7 for a specific example for the RelatedIdentifier element. Replace the text of subclause 4.3.1 by the following text: Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/Amd.1:2007(E) ISO/IEC 2007 All rights reserved 3The Type element shall only appear as a child element of a
31、Statement that shall appear as a child element of a Descriptor that shall appear as a child element of an Item. Replace the text of subclause 4.3.2 by the following text: The Type element will allow identifying special types of Digital Items. Such types can be defined, for example, by different part
32、s of ISO/IEC 21000 or ISO/IEC 23000. In subclause 4.4, replace schema definition by the following Schema text: Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/Amd.1:2007(E) 4 ISO/IEC 2007 All rights reservedIn subclause 4.5.4, replace the example by the following: urn:mpegRA:mpeg21
33、:dii:doi:10.1000/123456789 urn:mpegRA:mpeg21:dii:iswc:T-034.524.680-1 Replace C.7 with the following text: ISO 15706-2 was developed within Technical Committee ISO/TC 46, Information and Documentation, Subcommittee SC 9, Identification and Description. The project was initiated by the Society of Mot
34、ion Picture and Television Engineers (SMPTE) and developed originally as ISO 20925 but has now been standardised as ISO 15706-2. This International Standard specifies a system for version identification of audiovisual works to be used in conjunction with the International Standard Audiovisual Number
35、 (ISAN) defined in ISO 157061). An ISAN combined with the version identifier specified in Clause 4 of the ISAN Standard shall be known as a V-ISAN. A V-ISAN shall be a registered, globally unique identifier of a version of an audiovisual work. A V-ISAN identifies a specific version of an audiovisual
36、 work throughout its life and is intended for use wherever precise and unique identification of a specific version of an audiovisual work would be desirable, such as in audiovisual production and distribution systems and in broadcasting applications. A V-ISAN identifies a specific version of an audi
37、o-visual work as the unique compound of its component elements (e.g. its artistic content, languages, editing, and technical format) throughout its life and independent of any physical form in which the version is distributed. The assignment of a V-ISAN to a version of an audiovisual work shall not
38、be used as evidence of the ownership of rights to either that version or to the audiovisual work itself.” 1) Originally known as ISO 15706:2002. The standard will be renamed ISO 15706-1 in the next version. Amendment 1:2007 toCAN/CSA-ISO/IEC 21000-3:04ISO/IEC 21000-3:2003/Amd.1:2007(E) ISO/IEC 2007
39、All rights reserved 5Add a new informative Annex D between current Annexes C and D as follows. Renumber Annex D as Annex E and change all references accordingly: Annex D (informative) Using ISO/IEC 21000-3 in the MPEG-21 Multimedia Framework D.1 Overview The Digital Item is the fundamental unit of d
40、istribution and transaction within the MPEG-21 Multimedia Framework. As such it is axiomatic that it must meet the requirements of those wishing to use Digital Items as part of their distribution and usage processes. When a User creates a Digital Item containing a set of Digital Resources, a unique
41、identifier for the Item is assigned. Following the assignment of the identifiers, it is intended that other Users should always identify the Digital Item by its originally assigned identifier. However, in some environments, some Users may need to distinguish between different “variants” of a single
42、Digital Item that are identified by a single Digital Item Identifier. Thus, a single Digital Item Identifier will not be sufficient for all Users on its own even if, for the creator of the Item, the different variants represent exactly the same Digital Item. Concrete Specific examples of this generi
43、c problem are given below. Example 1 Libraries A text publisher creates an eBook with one resource (e.g. a PDF file) and assigns a unique identifier for this eBook. An electronic library, responsible for preserving this eBook, creates a Digital Item (by generating a Digital Item Declaration file con
44、taining relevant metadata and, a reference to the PDF file) and adds the publisher-generated identifier say a DOI as the Digital Item Identifier). Following the removal of a couple of typographic errors in the original resource, the library receives an updated version of the eBook albeit with the sa
45、me DOI. This is, from the publishers perspective, correct as the “new version” is commercially the same entity it is the same “fundamental unit of transaction and distribution”; there is no reason to the publisher to distinguish between the “old version” and the “new version”. Thus, for the publishe
46、r no new identifier is required. For the library, however, which has the obligation to preserve both versions in order to provide a complete historical record of publication, a problem arises: When following the same method of creating the Digital Item as described above, the library has to deal wit
47、h two entities with the same DII but with different content. Example 2 Codecs Assume a Digital Item containing a set of sound recordings is collated into a Digital Item identified by a DII. When this Item gets distributed and adapted for different devices e.g. by using ISO/IEC 21000-7 methods to cha
48、nge the codecs used the enclosed intellectual property will not change. If the commercial details under which the Item is marketed (such as the retail price) remain unchanged, there is no need for the original creator of the Digital Item to differentiate between different variants. Applications and
49、devices and possibly Users however, will need to be able to distinguish between, say, an AAC variant and an MP3 variant of the Digital Item. Example 3 Picture Resolution The same problems arise when a film is to be made available in different resolutions. The content, identified for example by an International Standard Audio-visual Number (ISAN), remains the same, but there is need for some Users to distinguish between a high-resolution and a low-resolution “variant”. Amendment 1:2007 toCAN/CSA-ISO/IEC
