1、BSI Standards PublicationBS ISO 17316:2015Information anddocumentation Internationalstandard link identifier (ISLI)BS ISO 17316:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 17316:2015.The UK participation in its preparation was entrusted to TechnicalCom
2、mittee IDT/2/18, Identifiers and metadata.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards I
3、nstitution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 75442 5ICS 01.140.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2015.Amendments is
4、sued since publicationDate Text affectedBS ISO 17316:2015 ISO 2015Information and documentation International standard link identifier (ISLI)Information et documentation Identification de connexion standard international (ISLI)INTERNATIONAL STANDARDISO17316First edition2015-05-15Reference numberISO
5、17316:2015(E)BS ISO 17316:2015ISO 17316:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
6、 mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva
7、, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 17316:2015ISO 17316:2015(E)Foreword ivIntroduction v1 Scope . 12 Terms and definitions . 13 Link model of ISLI 24 Structure and syntax of ISLI 24.1 Service field 24.2 Link field . 24.3 Check digit field 24.4 ISLI
8、 representation for human reading . 35 Principles for allocation of ISLI . 35.1 Allocation of ISLI service codes 35.2 Assignment of ISLI codes . 36 Metadata . 46.1 ISLI metadata . 46.2 Service metadata . 47 Administration of the ISLI system 4Annex A (normative) Allocation of service codes and assign
9、ment of ISLI codes .5Annex B (normative) ISLI metadata specification 6Annex C (normative) Administration of the ISLI system . 8Annex D (normative) Method for calculating the check digit of an ISLI .10Bibliography .12 ISO 2015 All rights reserved iiiContents PageBS ISO 17316:2015ISO 17316:2015(E)Fore
10、wordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a techni
11、cal 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 part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of e
12、lectrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document wa
13、s drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility 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 pate
14、nt rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not c
15、onstitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe
16、 committee responsible for this document is ISO/TC 46, Information and documentation, Subcommittee SC 9, Identification and description.iv ISO 2015 All rights reservedBS ISO 17316:2015ISO 17316:2015(E)IntroductionDevelopments in technology have already provided a reliable foundation to set up links
17、between resources, whether these are stored in digital or traditional form. The developments have, in particular, reinforced the ability to link resources of different types. This allows users to experience rich media content, such as audio files or video files, more easily. Further, they not only p
18、rovide traditional users with enriched information, but also improve accessibility of textual material to individuals who are visually impaired and extend the capabilities of educational materials.Technologies providing such capabilities have typically been hardware dependent or enclosed within a pa
19、rticular ecosystem. To provide improved interoperability and better access to these technologies and services, the International Standard Link Identifier (ISLI) defines connections between these resources. The approach taken in this International Standard comes from experience in several different p
20、rojects, but it allows a general way of identifying links which enables new applications in more fields, such as multimedia. The link built by ISLI makes resources more readily available, and thus creates more value through their use. ISO 2015 All rights reserved vBS ISO 17316:2015BS ISO 17316:2015I
21、nformation and documentation International standard link identifier (ISLI)1 ScopeThis International Standard specifies an identifier of links between entities (or their names) in the field of information and documentation. These entities can be documents, media resources, people, or more abstract it
22、ems such as times or places.The ISLI system identifies links between entities that are related to each other so that, for instance, they can be rendered jointly. It does this by registering each link identifier with information (metadata) that specifies the link. The ISLI does not change the content
23、, ownership, right of access, or existing identification of these entities.This International Standard does not specify the technology used to represent the identifier or realize the link. It enables applications to be built which use the interoperable ISLI system for the identification of links.2 T
24、erms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1entitysomething capable of being uniquely identifiedNote 1 to entry: Entities include material objects, electronic representations of content, abstract items (such as times, places), parties (human an
25、d corporate), as well as anything else that can be identified uniquely.Note 2 to entry: A defined fragment of an entity is itself an entity.2.2ISLI codeInternational Standard Link Identifier assigned in accordance with the specifications of this International Standard2.3linkdirected relationship bet
26、ween two entities (2.1) in the field of information and documentation2.4namestring of characters that identifies an entity (2.1), possibly (but not necessarily) in the form of an identifier specified in an International Standard2.5registrantparty requesting the assignment of an ISLI code (2.2) to a
27、link (2.3)2.6serviceclass of links (2.3) with a common application between typed sources (2.7) and typed targets (2.8)2.7sourceentity (2.1) which is the origin of a link (2.3)INTERNATIONAL STANDARD ISO 17316:2015(E) ISO 2015 All rights reserved 1BS ISO 17316:2015ISO 17316:2015(E)2.8targetentity (2.1
28、) which is the destination of a link (2.3)3 Link model of ISLIAn ISLI code specifies the link between a source and a target as shown in Figure 1.Figure 1 Link model of ISLI4 Structure and syntax of ISLIAn ISLI code, as shown in Table 1, comprises decimal digits in three fields, which includes servic
29、e field, link field, and check digit field.Table 1 ISLI structureService field Link field Check digit fieldsix digits (see 4.1)variable length (see 4.2)one digit (see 4.3)4.1 Service fieldThe service field contains the service code, which is allocated by the registration authority.The service code c
30、omprises six decimal digits.4.2 Link fieldThe link field contains the link code, which defines the link between the source and the target. It is assigned by the registration authority. The link code comprises decimal digits and its length is defined for each service by the registration authority.4.3
31、 Check digit fieldThe check digit provides protection against errors.The check digit field contains a single decimal digit calculated from the contents of the service field and link field in accordance with Annex D.2 ISO 2015 All rights reservedBS ISO 17316:2015ISO 17316:2015(E)4.4 ISLI representati
32、on for human readingISLI is a code intended for machine reading. When an ISLI code needs to be shown on a screen or printed, the hyphen symbol “-” should be added to separate the fields and “ISLI” should be inserted before the numeric code. The symbol “-” and “ISLI” do not form part of the identifie
33、r.EXAMPLE ISLI 116063-4520086293791473426443001-95 Principles for allocation of ISLI5.1 Allocation of ISLI service codes5.1.1 An ISLI service code shall be allocated to a service by the registration authority if an application meets the criteria that the registration authority shall publish.5.1.2 An
34、 ISLI service code shall be allocated to one service and each service shall be allocated only one ISLI service code.5.1.3 An ISLI service code shall be permanently allocated to a given service and shall never be altered, replaced, or reused, although it may be withdrawn from use for new assignments
35、of ISLI codes.5.1.4 Details on the allocation of ISLI service codes are contained in A.1.5.2 Assignment of ISLI codes5.2.1 An ISLI code shall be assigned by the registration authority on receipt of an application for a code to be associated with a particular service.5.2.2 An ISLI code shall not be a
36、ssigned unless the registrant wishes to designate that the relevant source and target are to be linked within the requested service.5.2.3 Within a service, each ISLI code shall be assigned to only one link from a given source to a given target, and each such link shall be assigned only one ISLI code
37、.NOTE Provided two ISLI codes are assigned in different services, they can refer to the same sources and targets.5.2.4 The ISLI shall identify a link rather than a single entity.5.2.5 An ISLI code may be assigned to a link where the source and/or the target is an entity whose content changes over ti
38、me, such as a webpage.5.2.6 A link from entity A to entity B shall have a different ISLI code than a link from entity B to entity A.5.2.7 An ISLI code shall be permanently assigned to a given link and shall never be altered, replaced, or reused, although it may be cancelled and marked as cancelled i
39、n the register of the registration authority.NOTE Cancellation can be required if the ISLI code was assigned in error or has become out of date.5.2.8 In identifying sources and targets, the use of identifiers specified in ISO standards shall be preferred.5.2.9 Details on the assignment of ISLI codes
40、 are contained in A.2. ISO 2015 All rights reserved 3BS ISO 17316:2015ISO 17316:2015(E)6 Metadata6.1 ISLI metadataEach ISLI code shall be associated with ISLI metadata as defined in Annex B. The ISLI code and ISLI metadata shall be included in a register operated by the registration authority.6.2 Se
41、rvice metadataEach service code shall be associated with metadata as defined in Annex B. The service code and its metadata shall be included in a register operated by the ISLI registration authority.7 Administration of the ISLI systemThe ISLI system shall be administered by the registration authorit
42、y of this International Standard, hereafter referred to as the ISLI registration authority.The responsibilities of the ISLI registration authority are contained in Annex C.4 ISO 2015 All rights reservedBS ISO 17316:2015ISO 17316:2015(E)Annex A (normative) Allocation of service codes and assignment o
43、f ISLI codesA.1 Allocation of service codesA.1.1 The registration authority shall allocate a service code to a service if an application for such an allocation meets the criteria for the allocation of such a code which it has published.A.1.2 When a service code is allocated, the registration authori
44、ty shall provide the kernel metadata in Table B.3.A.1.3 When the registration authority allocates a service code, it shall specify which of the metadata elements are to be made public through the resolution and query services operated in accordance with C.1.A.1.4 The registration authority may withd
45、raw a service code from use with future ISLI assignments.A.1.5 The registration authority shall not allocate service codes which start with the digit “9” to allow for extension of the length of the service field in a future edition of this International Standard.A.2 Assignment of ISLI codesA.2.1 The
46、 registration authority shall assign an ISLI code by combining the service code, an assigned link code, and a check digit calculated according to Annex D.A.2.2 The assigned link code shall be unique within the service.A.2.3 The registration authority shall enter the assigned ISLI code, together with
47、 the metadata specified in Clause 6, into the register it shall operate for the purpose. ISO 2015 All rights reserved 5BS ISO 17316:2015ISO 17316:2015(E)Annex B (normative) ISLI metadata specificationB.1 ISLI metadataThe descriptive metadata elements contained in Table B.1 and the administrative met
48、adata elements in Table B.2, together with additional elements defined by the registration authority, shall be registered with each ISLI code. The registration authority shall define appropriate schemas for the representation of these elements.The registration authority shall also define appropriate
49、 schemas for the representation of the metadata contained in Table B.3 and Table B.4.Table B.1 Kernel metadata for ISLI codeKernel ele-ment(s)Description ExampleISLI code Code assigned under this International StandardISLI 116063-4520086293791473426443001-9Source type Data type of the source selected from a list maintained by the registration authority and specified in the service code kernel metadata (see Table B.3)Notated musicSource name Name of source (if no fragment defined) or entire source from which fragment is takenISMN 979034512
