ISO/TR 21718:2017

TECHNICAL ISO/TR
REPORT 21718
First edition
2017-11
Intelligent transport systems —
Spatio-temporal data dictionary
for cooperative ITS and automated
driving systems
Systèmes de transport intelligents — Dictionnaire de données spatio-
temporelles pour les systèmes de conduite automatisée et les STI
coopératifs
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Contents and descriptive names of data dictionary . 3
6 Data dictionary description . 3
Annex A (informative) Dedicated data type for data dictionary .184
Bibliography .191
Foreword
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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
iv © ISO 2017 – All rights reserved

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.
TECHNICAL REPORT ISO/TR 21718:2017(E)
Intelligent transport systems — Spatio-temporal data
dictionary for cooperative ITS and automated driving
systems
1 Scope
This document describes a spatio-temporal data dictionary for cooperative ITS and automated driving
systems.
This data dictionary includes static data and dynamic data.
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
2 © ISO 2017 – All rights reserved

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 and AbsoluteGeoCoordinate specifies a geo position with longitude and latitude values
description with a deca micro degree accuracy stored in 24 bit integer value.
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 and Acceleration provides a value and unit of vehicle acceleration.
description
Value of unit of acceleration is given by unit code which is assigned as 0,01 m/sec*sec,
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 and Acceleration Set provides accelerations of three axial directions of vehicle.
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 and AccelerationConfidence provides the confidence of acceleration of the vehicle.
description
It is a confidence level of 95 % of reliability.
Data
structure 

Issued by JARI source document proposed CITS data dictionary
Remarks
4 © ISO 2017 – All rights reserved

accuracy millimetre
Data concept AccuracyMillimetre Data status category static
name
Data concept type value domain
Definition and It is one of the accuracy expressions for a length or distance.
description
Unit is a millimetre.
Data
structure 



Issued by source document ISO 22837:2009
Remarks
advisory point
Data concept AdvisoryPoint Data status category static
name
Data concept type data element
Definition and Advisor Point provides a location and contents of the advisory on the road.
description
Data
structure 
...