ISO/TR 21718:2019

TECHNICAL ISO/TR
REPORT 21718
Second edition
2019-01
Intelligent transport systems —
Spatio-temporal data dictionary
for cooperative ITS and automated
driving systems 2.0
Systèmes de transport intelligents — Dictionnaire de données spatio-
temporelles pour les systèmes de conduite automatisée 2.0 et les STI
coopératifs
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword . iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Abbreviated terms .3
5 Contents and descriptive names of data dictionary .3
6 Data dictionary description .4
(informative) Dedicated data type for data dictionary . 230
(informative) List of data concept name from SAE J2735: Dedicated Short Range
Communications (DSRC) Message Set Dictionary . 237
Bibliography . 248

iii
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This second edition cancels and replaces the first edition (ISO/TR 21718:2017), which has been
technically revised. The main changes since the last edition are the following:
— task force team have collaborated with SAE, and combined the SAE deliverable and the first edition;
— the list of the data concept names described in SAE J 2735: 2016 have been included as Annex B.
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 www.iso.org/members.html.

iv
Introduction
Cooperative ITS and automated driving systems as energy-saving technology have attracted much
attention. These systems are expected to reduce traffic congestion and achieve smoother
transportation.
Recently, car manufacturers, car parts manufacturers and IT companies have started driving tests for
automated driving systems on the public road. Several car manufacturers have released the schedule of
commercial viability and automated driving systems and are expected to put it into practical use within
two or three years.
In the existing ITS applications, geographical information are optimally designed for individual systems.
Thus, a large amount of resources are required in order to create, provide and maintain this
information.
In the future, spatio-temporal data for ITS which includes static and dynamic temporal-spatial data will
be required for Cooperative ITS and automated driving systems. In order to create, provide and
maintain these data, much more resources will be required.
Spatio-temporal data can be used for different types of application systems. A common understanding
and sharing of spatio-temporal data is formulated by this data dictionary. For instance, spatio-temporal
data for ITS includes location information or has relationships with location.
Standardization of spatio-temporal data dictionary is expected to contribute to research and
development and dissemination of cooperative ITS and automated systems by stakeholders.
v
TECHNICAL REPORT ISO/TR 21718:2019(E)

Intelligent transport systems — Spatio-temporal data
dictionary for cooperative ITS and automated driving systems
2.0
1 Scope
This document is a compilation of terms to be contained in a spatio-temporal data dictionary for
cooperative-ITS and automated driving systems.
This data dictionary includes static data (e.g. map, road signs and buildings) and dynamic data (e.g.
traffic condition, accident reports).
This document is an updated and expanded version of ISO/TR 21718:2017.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
aggregate domain
data concept that defines a grouping of data elements and/or data frames
3.2
data concept
item that may be stored in a data dictionary that refers to an abstraction or thing in the natural world
that can be identified with explicit boundaries and meaning and whose properties and behaviour all
follow the same rules
Note 1 to entry: Data concepts can be classified into the following types: object class, value domain, data element,
aggregate domain, data frame, message, interface dialogue, dictionary document, or module.
3.3
data concept type
categorization of the kind of data concept
3.4
data dictionary
listing of data concepts and their meta-attributes in a consistent format
3.5
data element
data concept represented by a specific value domain that describes a single atomic property about an
object class
Note 1 to entry: A data element is composed of an object class, a property of the represented object class and a
value domain.
3.6
data frame
data concept represented by a specific aggregate domain that describes information of interest through
a useful grouping of more atomic properties about one or more object classes
Note 1 to entry: The grouping may be a set, sequence, or a choice.
3.7
dynamic data
data which has short life-span data such as a position of vehicle
3.8
message
data concept that is a grouping of data elements, data frames, or data elements and data frames that is
used to convey a complete set of information
Note 1 to entry: For the purposes of this document, a message is an abstract description; it is not a specific
instance.
3.9
module
data concept that contains the formal syntactic definition, and optionally the semantic definition, of a
defined set of other data concepts that are all version-controlled as a single unit
Note 1 to entry: A module can be represented in multiple languages (e.g., ASN.1 or XML Schema) and compiled by
computer systems.
3.10
source
document or other reference that was used to develop the pertinent data concept
3.11
spatio-temporal (adjective)
relating to both space and time
3.12
static data
data which do not change automatically
3.13
value domain
data concept that defines a set of permissible values
4 Abbreviated terms
ACC Adaptive Cruise Control systems
APS Assisted Parking System
CACC Cooperative adaptive cruise control
CIWS Cooperative Intersection signal information and violation Warning Systems
CSWS Curve Speed Warning Systems
FVCMS Forward Vehicle Collision Mitigation Systems
GNSS Global Navigation Satellite System
ITS Intelligent Transport Systems
JARI Japan Automobile Research Institute
LCDAS Lane Change Decision Aid Systems
LKAS Lane Keeping Assistance Systems
TISA Traveller Information Services Association
5 Contents and descriptive names of data dictionary
The data dictionary consists of the following items.
Data concept name descriptive name of data concepts
data concept type module/message/data frame/data element/aggregate
domain/value domain
data status category dynamic/static
Definition and description Definition and description of data contents
Data definition of data content by XML schema
structure
Issued by authors who published the source documents
source documents original documents
remark other information
6 Data dictionary description
This data dictionary is described alphabetically.
[a]
absolute geo coordinate
Data concept AbsoluteGeoCoordinate Data status category static
name
Data concept type data element
Definition AbsoluteGeoCoordinate specifies a geo position with longitude and latitude values
and with a deca micro degree accuracy stored in 24 bit integer value.
description Longitude: 24-bit representation of a longitude value in deca micro degree precision.
Latitude: 24-bit representation of a latitude value in deca micro degree precision.
Altitude: Elevation of location in metres above/below Mean Sea Level.
Data
structure 





Issued by source document ISO/TS 21219-22:2017

Remarks
acceleration
Data concept Acceleration Data status category dynamic
name
Data concept type data element
Definition Acceleration provides a value and unit of vehicle acceleration.
and Value of unit of acceleration is given by unit code which is assigned as 0,01 m/sec*sec,
description 0,02 m/sec*sec, 0,1 m/sec*sec, 0,25 m/sec*sec, 1 m/sec*sec, 0,01 G and 0,02 G.
Data
structure 




Issued by JARI source document proposed CITS data dictionary
Remarks
acceleration set
Data concept Acceleration Set Data status category dynamic
name
Data concept type data element
Definition Acceleration Set provides accelerations of three axial directions of vehicle.
and
description
Data
structure 



Issued by JARI source document proposed CITS data dictionary
Remarks
acceleration confidence
Data concept Acceleration confidence Data status category dynamic
name
Data concept type data element
Definition AccelerationConfidence provides the confidence of acceleration of the vehicle.
and
It is a confidence level of 95 % of reliability.
description
Data
structure  

Issued by JARI source document proposed CITS data dictionary
Remarks
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