Intelligent transport systems — Identifiers

This document defines the rules and processes used to assign and manage identifiers to items of interest within the ITS community.

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ISO 5345:2022 - Intelligent transport systems — Identifiers Released:4/6/2022
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Intelligent transport systems —
Reference number
ISO 5345:2022(E)
© ISO 2022

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ISO 5345:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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or ISO’s member body in the country of the requester.
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  © ISO 2022 – All rights reserved

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ISO 5345:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Concepts . 2
5.1 Purpose . 2
5.2 Scope of identifiers . 3
5.3 Existing assignments . 3
6 Attributes for each register . 3
7 Attributes for each item . 4
7.1 General attributes . 4
7.2 Special attributes . 4
8 Requests . 5
8.1 Authorized requesters . 5
8.2 Responsibilities of requesters and assignees . 6
8.3 Contents of request . 6
8.4 Timing of request . 6
8.5 Requesting multiple assignments . 6
8.6 Appeals process . 6
Annex A (normative) Item registration request form . 7
© ISO 2022 – All rights reserved

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ISO 5345:2022(E)
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
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at
  © ISO 2022 – All rights reserved

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ISO 5345:2022(E)
ISO/TC 204 has defined several documents that require globally unique identifiers to reference specific
items of interest (e.g. protocols, ITS applications, organizations). Items that need to be identified can
be registered in the Registry of Intelligent Transport System Items (RITSI), where they are assigned a
formal identifier. RITSI is designed in an open format such that:
— documents, including those developed outside of ISO, can:
— define data elements that reference RITSI registers as their value domain specification, and
— include informative statements that indicate the identifier that has been assigned to a specific
— new items can be recorded in a timely fashion;
— the listing of registered items can be browsed and searched.
This document is designed to be used by the Intelligent Transport Systems (ITS) community at large
but is particularly directed at application developers and equipment providers.
This document specifies the procedures used to manage RITSI. The document is presented as follows:
— Clause 5 provides an overview of the document and the concepts used;
— Clause 6 defines the attributes that are used to characterize item classes;
— Clause 7 defines attributes that are used to characterize registered items;
— Clause 8 defines the information and rules related to requests that are submitted;
— Annex A provides the request form for use for all requested changes to the registers maintained
according to the rules defined by this document.
© ISO 2022 – All rights reserved

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Intelligent transport systems — Identifiers
1 Scope
This document defines the rules and processes used to assign and manage identifiers to items of
interest within the ITS community.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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/IEC 8824-1, Information technology — Abstract Syntax Notation One (ASN.1) — Part 1: Specification
of basic notation
ISO 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country
ISO/TS 14812, Intelligent transport systems — Vocabulary
ISO 17419, Intelligent transport systems — Cooperative systems — Globally unique identification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17419, ISO/TS 14812 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
expression used to distinguish a registered item (3.6) uniquely and unambiguously within the scope of
an item class (3.3)
member of an item class (3.3)
Note 1 to entry: The term “item” can be used to refer to any entity of interest, whether it has been included in a
register or not.
item class
set of entities of interest that need to be uniquely distinguished from one another
table where each row is used to assign an identifier (3.1) to represent an item (3.2)
© ISO 2022 – All rights reserved

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ISO 5345:2022(E)
collection of registers (3.4)
registered item
item (3.2) approved for inclusion in a register (3.4)
entity responsible for submitting requests for an item (3.2)
Note 1 to entry: The request can relate to registering a new item or modifying an existing registered item.
4 Abbreviated terms
CCMS cooperative ITS credentials management system
ICANN Internet Corporation for Assigned Names and Numbers
ICT information and communications technology
ISO International Organization for Standardization
ITS intelligent transport system
ITS-S ITS station
MA maintenance agency
NRA/I national registration authority for issuers
TCP transmission control protocol
URL universal resource locator
5 Concepts
5.1 Purpose
Within information exchanges, there is often a need to reference an entity of interest (e.g. a country, an
organization, a document, a protocol) unambiguously and concisely. One way to achieve this is to define
an identifier, which is a concise expression (e.g. an integer value) that is used to represent the item of
interest. The identifier can be an integer, a hierarchical structure (e.g. an ASN.1 OBJECT IDENTIFIER) or
any other concise representation of a more complex concept (e.g. a two-character country code).
The association of an identifier with a specific item is provided with the use of a register (i.e. a listing).
The register is presented as a table with columns representing different attributes (e.g. the name of
the item) and

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