Information and documentation — International standard link identifier (ISLI)

ISO 17316:2014 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 items 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, 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.

Information et documentation — Identification de connexion standard international (ISLI)

Informatika in dokumentacija - Mednarodni standardni identifikator povezave (ISLI)

Ta mednarodni standard določa identifikator povezav med entitetami (ali njihovimi imeni) na področju informatike in dokumentacije. Te entitete so lahko dokumenti, medijski viri, osebe ali bolj abstraktni elementi, kot so časi in kraji.
Sistem ISLI identificira povezave med sorodnimi entitetami, ki se lahko na primer
obdelujejo skupaj. To stori tako, da vsak identifikator povezave opremi z informacijami (metapodatki), ki določajo povezavo. Sistem ISLI ne spreminja vsebine, lastništva, dovoljenja za dostop ali obstoječih vrst identifikacije teh entitet.
Ta mednarodni standard ne določa tehnologije, ki se uporablja za predstavitev identifikatorja ali vzpostavitev povezave. Omogoča razvoj aplikacij, ki uporabljajo interoperabilni sistem ISLI za identifikacijo povezav.

General Information

Status
Published
Publication Date
11-May-2015
Current Stage
9093 - International Standard confirmed
Start Date
30-Sep-2020
Completion Date
30-Sep-2020

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INTERNATIONAL ISO
STANDARD 17316
First edition
2015-05-15
Information and documentation —
International standard link
identifier (ISLI)
Information et documentation — Identification de connexion
standard international (ISLI)
Reference number
ISO 17316:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 17316:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All 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 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 ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 17316:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Terms and definitions ..................................................................................................................................................................................... 1

3 Link model of ISLI ................................................................................................................................................................................................ 2

4 Structure and syntax of ISLI ...................................................................................................................................................................... 2

4.1 Service field ................................................................................................................................................................................................ 2

4.2 Link field ....................................................................................................................................................................................................... 2

4.3 Check digit field ...................................................................................................................................................................................... 2

4.4 ISLI representation for human reading ............................................................................................................................. 3

5 Principles for allocation of ISLI ............................................................................................................................................................. 3

5.1 Allocation of ISLI service codes ................................................................................................................................................ 3

5.2 Assignment of ISLI codes ............................................................................................................................................................... 3

6 Metadata ....................................................................................................................................................................................................................... 4

6.1 ISLI metadata ........................................................................................................................................................................................... 4

6.2 Service metadata ................................................................................................................................................................................... 4

7 Administration of the ISLI system ...................................................................................................................................................... 4

Annex A (normative) Allocation of service codes and assignment of ISLI codes ...................................................5

Annex B (normative) ISLI metadata specification .................................................................................................................................. 6

Annex C (normative) Administration of the ISLI system ................................................................................................................. 8

Annex D (normative) Method for calculating the check digit of an ISLI .......................................................................10

Bibliography .............................................................................................................................................................................................................................12

© ISO 2015 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 17316:2015(E)
Foreword

ISO (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 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 part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical 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 was 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 patent 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

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 46, Information and documentation, Subcommittee

SC 9, Identification and description.
iv © ISO 2015 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 17316:2015(E)
Introduction

Developments in technology have already provided a reliable foundation to set up links 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 provide 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

particular 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 projects,

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 v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 17316:2015(E)
Information and documentation — International standard
link identifier (ISLI)
1 Scope

This 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 items 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, 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 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
entity
something capable of being uniquely identified

Note 1 to entry: Entities include material objects, electronic representations of content, abstract items (such as

times, places), parties (human and 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.
2.2
ISLI code

International Standard Link Identifier assigned in accordance with the specifications of this

International Standard
2.3
link

directed relationship between two entities (2.1) in the field of information and documentation

2.4
name

string of characters that identifies an entity (2.1), possibly (but not necessarily) in the form of an

identifier specified in an International Standard
2.5
registrant
party requesting the assignment of an ISLI code (2.2) to a link (2.3)
2.6
service

class of links (2.3) with a common application between typed sources (2.7) and typed targets (2.8)

2.7
source
entity (2.1) which is the origin of a link (2.3)
© ISO 2015 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 17316:2015(E)
2.8
target
entity (2.1) which is the destination of a link (2.3)
3 Link model of ISLI

An ISLI code specifies the link between a source and a target as shown in Figure 1.

Figure 1 — Link model of ISLI
4 Structure and syntax of ISLI

An ISLI code, as shown in Table 1, comprises decimal digits in three fields, which includes

— service field,
— link field, and
— check digit field.
Table 1 — ISLI structure
Service field Link field Check digit field
six digits variable length one digit
(see 4.1) (see 4.2) (see 4.3)
4.1 Service field

The service field contains the service code, which is allocated by the registration authority.

The service code comprises six decimal digits.
4.2 Link field

The 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 Check digit field
The 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 reserved
---------------------- Page: 7 ----------------------
ISO 17316:2015(E)
4.4 ISLI representation for human reading

ISLI 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 identifier.
EXAMPLE ISLI 116063-4520086293791473426443001-9
5 Principles for allocation of ISLI
5.1 Allocation of ISLI service codes

5.1.1 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 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 of ISLI codes.

5.1.4 Details on the allocation of ISLI service codes are contained in A.1.
5.2 Assignment of ISLI codes

5.2.1 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 assigned 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.

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 time, 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 in 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 are contained in A.2.
© ISO 2015 – All rights reserved 3
---------------------- Page: 8 ----------------------
ISO 17316:2015(E)
6 Metadata
6.1 ISLI metadata

Each 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 Service metadata

Each 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.

...

SLOVENSKI STANDARD
SIST ISO 17316:2017
01-februar-2017

Informatika in dokumentacija - Mednarodni standardni identifikator povezave (ISLI)

Information and documentation - International standard link identifier (ISLI)

Information et documentation - Identification de connexion standard international (ISLI)

Ta slovenski standard je istoveten z: ISO 17316:2015
ICS:
01.140.20 Informacijske vede Information sciences
SIST ISO 17316:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO 17316:2017
---------------------- Page: 2 ----------------------
SIST ISO 17316:2017
INTERNATIONAL ISO
STANDARD 17316
First edition
2015-05-15
Information and documentation —
International standard link
identifier (ISLI)
Information et documentation — Identification de connexion
standard international (ISLI)
Reference number
ISO 17316:2015(E)
ISO 2015
---------------------- Page: 3 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All 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 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 ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Terms and definitions ..................................................................................................................................................................................... 1

3 Link model of ISLI ................................................................................................................................................................................................ 2

4 Structure and syntax of ISLI ...................................................................................................................................................................... 2

4.1 Service field ................................................................................................................................................................................................ 2

4.2 Link field ....................................................................................................................................................................................................... 2

4.3 Check digit field ...................................................................................................................................................................................... 2

4.4 ISLI representation for human reading ............................................................................................................................. 3

5 Principles for allocation of ISLI ............................................................................................................................................................. 3

5.1 Allocation of ISLI service codes ................................................................................................................................................ 3

5.2 Assignment of ISLI codes ............................................................................................................................................................... 3

6 Metadata ....................................................................................................................................................................................................................... 4

6.1 ISLI metadata ........................................................................................................................................................................................... 4

6.2 Service metadata ................................................................................................................................................................................... 4

7 Administration of the ISLI system ...................................................................................................................................................... 4

Annex A (normative) Allocation of service codes and assignment of ISLI codes ...................................................5

Annex B (normative) ISLI metadata specification .................................................................................................................................. 6

Annex C (normative) Administration of the ISLI system ................................................................................................................. 8

Annex D (normative) Method for calculating the check digit of an ISLI .......................................................................10

Bibliography .............................................................................................................................................................................................................................12

© ISO 2015 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
Foreword

ISO (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 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 part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical 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 was 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 patent 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

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 46, Information and documentation, Subcommittee

SC 9, Identification and description.
iv © ISO 2015 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
Introduction

Developments in technology have already provided a reliable foundation to set up links 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 provide 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

particular 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 projects,

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 v
---------------------- Page: 7 ----------------------
SIST ISO 17316:2017
---------------------- Page: 8 ----------------------
SIST ISO 17316:2017
INTERNATIONAL STANDARD ISO 17316:2015(E)
Information and documentation — International standard
link identifier (ISLI)
1 Scope

This 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 items 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, 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 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
entity
something capable of being uniquely identified

Note 1 to entry: Entities include material objects, electronic representations of content, abstract items (such as

times, places), parties (human and 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.
2.2
ISLI code

International Standard Link Identifier assigned in accordance with the specifications of this

International Standard
2.3
link

directed relationship between two entities (2.1) in the field of information and documentation

2.4
name

string of characters that identifies an entity (2.1), possibly (but not necessarily) in the form of an

identifier specified in an International Standard
2.5
registrant
party requesting the assignment of an ISLI code (2.2) to a link (2.3)
2.6
service

class of links (2.3) with a common application between typed sources (2.7) and typed targets (2.8)

2.7
source
entity (2.1) which is the origin of a link (2.3)
© ISO 2015 – All rights reserved 1
---------------------- Page: 9 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
2.8
target
entity (2.1) which is the destination of a link (2.3)
3 Link model of ISLI

An ISLI code specifies the link between a source and a target as shown in Figure 1.

Figure 1 — Link model of ISLI
4 Structure and syntax of ISLI

An ISLI code, as shown in Table 1, comprises decimal digits in three fields, which includes

— service field,
— link field, and
— check digit field.
Table 1 — ISLI structure
Service field Link field Check digit field
six digits variable length one digit
(see 4.1) (see 4.2) (see 4.3)
4.1 Service field

The service field contains the service code, which is allocated by the registration authority.

The service code comprises six decimal digits.
4.2 Link field

The 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 Check digit field
The 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 reserved
---------------------- Page: 10 ----------------------
SIST ISO 17316:2017
ISO 17316:2015(E)
4.4 ISLI representation for human reading

ISLI 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 identifier.
EXAMPLE ISLI 116063-4520086293791473426443001-9
5 Principles for allocation of ISLI
5.1 Allocation of ISLI service codes

5.1.1 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 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 of ISLI codes.

5.1.4 Details on the allocation of ISLI service codes are contained in A.1.
5.2 Assignment of ISLI codes

5.2.1 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 assigned 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.

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 time, 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 in 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 are contained in A.2.
© ISO 2015 – All rights reserved 3
---------------------- Page: 11 -------------------
...

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