ISO/IEC DTR 25811

ISO/IEC JTC 1
Formatted: zzCover large
ISO/IEC CD TRDTR 25811(en)
ISO/IEC JTC 1
Secretariat:  ANSI
Date: 2026-08-31
Information technology — Case study of ISO/IEC 24039 for smart city
digital platforms
FDIS stage
ISO/IEC CD TRDTR 25811:2026(en)
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 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (France)
E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2026 – All rights reserved
ii
ISO/IEC CD TRDTR 25811:2026(en)
Contents
Foreword . iii
Introduction . iii
Scope . iii
Normative references . iii
Terms and definitions . iii
Abbreviated terms . iii
Overview . iii
Summary of ISO/IEC 24039 . iii
Objectives . iii
Benefits . iii
Case study method . iii
Case study framework . iii
Case collection . iii
Case review . iii
Case mapping . iii
Case analysis . iii
Case introduction . iii
Overview . iii
Case description . iii
Case study in alignment with ISO/IEC 24039 . iii
Overview . iii
Technical support . iii
Resource management . iii
Capability exposure . iii
Interface . iii
Conclusions . iii
(informative) Case collection template . iii
(informative) Application report of València City Platform from Spain . iii
(informative) Application report of Smart Chengdu Digital Platform from China . iii
(informative) Application report of Daegu Smart City Data Hub from the Republic of Korea iii
(informative) Application report of Henan Smart Grid Digital Platform from China . iii
(informative) Application report of Anyang IoT-based Smart City from the Republic of Koreaiii
(informative) Application report of Jinan Transportation Brain Project from China . iii
Bibliography . iii
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 1
© ISO/IEC 2026 – All rights reserved
iii
ISO/IEC CD TRDTR 25811:2026(en)
5 Overview . 3
5.1 Summary of ISO/IEC 24039 . 3
5.2 Objectives . 4
5.3 Benefits . 5
6 Case study method . 5
6.1 Case study framework . 5
6.2 Case collection . 6
6.3 Case review . 8
6.4 Case mapping. 8
6.5 Case analysis . 9
7 Case introduction . 9
7.1 Overview . 9
7.2 Case description . 9
8 Case study in alignment with ISO/IEC 24039 . 14
8.1 Overview . 14
8.2 Technical support . 14
8.3 Resource management . 21
8.4 Capability exposure . 29
8.5 Interface . 36
9 Conclusions . 40
Annex A (informative) Case collection template . 44
Annex B (informative) Application report of València City Platform from Spain . 46
Annex C (informative) Application report of Smart Chengdu Digital Platform from China . 50
Annex D (informative) Application report of Daegu Smart City Data Hub from the Republic of
Korea . 65
Annex E (informative) Application report of Henan Smart Grid Digital Platform from China . 70
Annex F (informative) Application report of Anyang IoT-based Smart City from the Republic of
Korea . 78
Annex G (informative) Application report of Jinan Transportation Brain Project from China . 85
Bibliography . 93

© ISO/IEC 2026 – All rights reserved
iv
ISO/IEC CD TRDTR 25811:2026(en)
Foreword
ISO (the International Organization for Standardization) is a and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide federation of national standardsstandardization.
National bodies (that are members of ISO member bodies). The workor IEC participate in the development 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. Internationalby the respective organization to deal with particular fields of
technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, 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 documentsdocument should be noted. This document was drafted in accordance with the editorial rules
of the ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives or
www.iec.ch/members_experts/refdocs).
Attention is drawnISO and IEC draw attention to the possibility that some of the elementsimplementation of
this document may beinvolve the subjectuse of (a) patent rights. ISO(s). ISO and IEC take no position
concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date
of publication of this document, ISO and IEC had not received notice of (a) patent(s) which may be required to
implement this document. However, implementers are cautioned that this may not represent the latest
information, which may be obtained from the patent database available at www.iso.org/patents and
https://patents.iec.ch. ISO and IEC 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)
see www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology.
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.htmlwww.iso.org/members.html and
www.iec.ch/national-committees.
© ISO/IEC 2026 – All rights reserved
v
ISO/IEC CD TRDTR 25811:2026(en)
Introduction
A smart city digital platform (SCDP) between smart city infrastructure and applications are the pivotal
[2]
component which supports the external access of data and services. ISO/IEC 24039 ISO/IEC 24039 specifies
the reference architecture of SCDPs.
[1]
The motivation of this document is to see how the reference architecture in ISO/IEC 24039 fits well with
smart cities digital platforms out there. Smart city digital platform deployment cases were collected and to
analysed. The case study results show the practicality of ISO/IEC 24039 as the SCDP reference architecture.
Therefore, this document can be used to disseminate ISO/IEC 24039 to smart city stakeholders for their
consideration on smart city digital platform planning, designing and implementation.
In the standardization aspect, with the case study referencing the existing SCDP reference architecture,
suggestions on future improvements of ISO/IEC 24039 are derived.
© ISO/IEC 2026 – All rights reserved
vi
ISO/IEC CD TRDTR 25811:2026(en)
Information technology — Case study of ISO/IEC 24039 for smart city
digital platforms
1 Scope
This document provides case studies on smart city digital platform deployments to see how data and service
functionalities in ISO/IEC 24039 are implemented. It includes the summary of ISO/IEC 24039, collected cases
of smart city digital platforms, and the analysis based on each capability specified in ISO/IEC 24039.
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:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
3.1
smart city digital platform, noun
SCDP, noun
combination of software and hardware that makes up the operating environment to support smart city
common services and applications
Note 1 to entry: The operating environment enables data from a variety of sources to be processed and common services
to be provided.
Note 2 to entry: Common services are aimed at improving the interoperability of cross-domain systems, for example data
exchange, catalogue service, subscription and distribution, etc.
[2]
[SOURCE: ISO/IEC 24039:2022,ISO/IEC 24039:2022 , 3.7]
4 Abbreviated terms
AI artificial intelligence
Formatted: Table header (+)
API application programming interface Formatted Table
AppKey application key
AppSecr
application secret
et
B/S browser/server
BI business intelligence
CCTV closed-circuit television
CDM common dimensional model
CKAN comprehensive knowledge archive network
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
CIM city information modelling
ETL extract-transform-load
ETL-
extract, transform, load - common data model
CDM
ETSI European Telecommunications Standards Institute
ETSI European Telecommunications Standards Institute / next generation service interfaces - linked
NGSI-LD data
FIWARE future internet ware
GIS geographic information system
HDFS Hadoop Distributed File System
HTTP hypertext transfer protocol
ICT information and communications technology
ID identification
IoT internet of things
IT information technology
J2EE java 2 platform, enterprise edition
JSON javascript object notation
LWM2M lightweight machine-to-machine
ML machine learning
MSA microservice architecture
NGSI next generation service interface
NGSI-LD next generation service interfaces - linked data
NGSIv2 next generation service interfaces version 2
NLP natural language processing
OAuth open authorization
OCR optical character recognition
oneM2
one machine-to-machine
M
PostGIS postgresql geographic information systems
PS-LTE public safety long-term evolution
RDBMS relational database management system
RESTful representational state transfer
RTSP real-time streaming protocol
SaaS software as a service
SCDP SCDP smart city digital platform
SDK SDK software development kit
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
SLA service level agreement
three-D three-dimensional
UAV uncrewed aerial vehicle
URL uniform resource locator
VLCi València City
5 Overview
5.1 Summary of ISO/IEC 24039
ISO/IEC 24039, published in 2022, specifies the reference architecture of SCDPs, with a focus on supporting
access to data and services for applications in smart cities, including the requirements of technical supporting,
resource management, capability exposure, and interface, which is displayed in Figure 1.
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)

Figure 1 — Reference architecture from the functional viewpoint of smart city digital platforms
(SCDPs)
[2]
[Source: ISO/IEC 24039:2022]ISO/IEC 24039:2022 ]
5.2 Objectives
The objectives of this document are as follows:
a) to explore any possibilities on potential updates of SCDP reference architecture in ISO/IEC 24039;
b) to promote the collaboration, communication and knowledge sharing of applying ISO/IEC 24039 among
various cases or different stakeholders;
c) to show the implementations of smart city digital platforms mapping with ISO/IEC 24039;
d) to collect and study the cases relevant with ISO/IEC 24039 from different countries and cities;
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
e) to study the methods, measures, solutions, processes related to how to realize the data and service
capabilities specified in the ISO/IEC 24039.
5.3 Benefits
The benefits of the application of ISO/IEC 24039 are as follows.
— Strengthen the consistence of platforms. When smart city digital platforms are designed and constructed
under the same framework and meet the requirements of data and services, the level of holistic
standardization and uniformity can be guaranteed and improved. More attention is easily paid to business
issues or governance work rather than technical and functional details. And it is beneficial to keep cross-
level coordination and continuity with ICT infrastructures and smart applications.
— Accumulate cities’ competitive advantages. After the identification of measures and process critical to
meet data and service requirements, different smart city digital platforms can directly adopt existing
useful experiences to optimize the construction and operation of platforms. Based on that, it is convenient
to promote the connection across different types of smart city digital platforms in a city, which can
facilitate the improvement of efficiency and effectiveness as well as the reduction of unnecessary technical
investments.
— Promote international communication and cooperation. In terms of how to implement the standard of
smart city digital platform, different countries and regions can share expertise, solutions, results,
problems, and learn from each other. Under this background, it can attract more participation and
attention from government, industries, and citizens to accelerate the process of global digital
transformation and sustainable development.
6 Case study method
6.1 Case study framework
In order to reveal how data and service functionalities in ISO/IEC 24039 are implemented, the case study
framework shown in Figure 2 was raised to streamline the case study process. Firstly, case collection was
initiated to find the most relevant cases of SCDP. Subsequently every case was reviewed to identify the main
points based on the primitive information. Additionally, for all functional capabilities, case mapping was
conducted to map the solutions from every collected case to the corresponding requirement. Ultimately, case
analysis was carried out to generate the insights of implementing ISO/IEC 24039.
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)

Figure 2 — Case study framework
6.2 Case collection
6.2.1 Case selection principle
In order to reveal how ISO/IEC 24039 are implemented, suitable cases have been collected and explored
widely by the ISO/IEC JTC 1 and ISO/IEC JTC 1/WG 11committee on information technology since April 2022.
As for the criteria for case collection, it mainly focuses on the conformity with data and services access
requirements specified by ISO/IEC 24039.
Based on this, four detailed characteristics have been taken into consideration: 1)
a) relevance, which means it is necessary to collect the cases of integrated platforms at the city level or the
domain level between smart city infrastructure and smart city applications; 2)
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
b) representativeness, which means the cases are typical combination of software and hardware to support
smart city construction and management or cope with urban problems and challenges in smart cities; 3)
c) maturity, which means the cases of digital solutions using advanced technology have operated for several
years and been tested by practice to provide excellent experiences;, and 4) ;
d) homogeneity, which means the implementation from different countries and cities are similar logically to
conduct repetitive comparison and formulate generic conclusions after within-case and cross-case
analysis.
6.2.2 Case collection template
The case collection template provides the framework to describe data and service measures adopted by
SCDPs. And the template (see Annex A) is divided into ten parts, including:
a) case title, describing the general and distinguishing heading of the case, including Case No., Name, Domain
Formatted: Font: Not Bold
and Version;
b) case background, describing the circumstances or situation underlying the case, including summary and
Formatted: Font: Not Bold
objective;
c) case description, clarifying the statement that represents the case, including overview, business plan,
Formatted: Font: Not Bold
design considerations, construction duration, and current progress;
d) stakeholder analysis, specifying how to identify, organize and prioritize the various parties, including
Formatted: Font: Not Bold
roles and responsibilities, relationships as well as benefit analysis;
e) technical solution, describing capabilities and framework of technologies to support problem-solving,
Formatted: Font: Not Bold
including major challenges, technical requirements, and business architecture/data
architecture/technical architecture;
f) mapping with ISO/IEC 24039, explaining implementation of requirements;
Formatted: Font: Not Bold
g) technical innovation or achievements, describing the improvement of current situation;
Formatted: Font: Not Bold
h) remark and suggestions, providing opinions, feedback, and implications;
Formatted: Font: Not Bold
i) further standardization demand, proposing developing new standards in response to specific concerns
Formatted: Font: Not Bold
and needs;
j) source, depicting original information of the case, including country, city, and contact information of the
Formatted: Font: Not Bold
provider.
6.2.3 Case interview
Basically, the information given in the case collection served as the main case study input. However,
information contained in the collected inputs cover different aspects. Sometimes it is too much
implementation specific and in other cases there are just abstract illustrations, which is insufficient
information to assess the level of implementation in a SCDP. And what is needed for case analysis are which
requirements are implemented and descriptions on evidence.
During the case analysis for collected inputs, online or offline interviews with the case input sources were
conducted to get more detailed and required information. And the interviewees have spread from government
personnel, project managers, technician, researchers who have a good knowledge of the background and
details of the cases. With the contributor interviews, case inputs have been updated to provide intended
information for case analysis.
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
The interview outline consists of three parts.
a) Introduction: Interviewer briefly explains ISO/IEC 24039 and motivations for case collection.
Interviewees provide the overview of the corresponding smart city digital platforms.
b) Interview questions: Interviewer ask questions for the mapping between each SCDP case and ISO/IEC
24039 (e.g. provide the description on how the requirements are implemented).
c) Discussion: Interviewer ask for the feedback on the ISO/IEC 24039 to see if any improvements can be
introduced.
6.3 Case review
For every collected case, the primitive, useful, and key information was selected and extracted to get the
summary. And all the related contents are organized into the structure of the general description, including
summary, objective, design background and operation process, stakeholder analysis, technical solution and
innovation, and the implementation outcome, including the general, mapping results (See Annex B , Annex C ,
Annex D , Annex E , Annex F , Annex G ). The former lays the foundation for the audiences to have a good
knowledge of the case in the short time, and the latter provides the methods, the measures, the strategies, etc.
adopted by the deployment of SCDPs in practice to implement ISO/IEC 24039.
6.4 Case mapping
The functional capabilities (e.g. data collection) which are defined in ISO/IEC 24039 have been listed as the
baseline as follows in Table 1 . Then, the corresponding part from all the cases was chosen and mapping into
every baseline. Afterwards, the explanation was put forward to clarify how data and service functionalities in
ISO/IEC 24039 are implemented for every case, which is the key to get a deep understanding of the practical
experience.
Table 1 — Case analysis baseline from ISO/IEC 24039
Functions of SCDPs Data and service requirements Clause reference of ISO/IEC 24039
a) Data collection 7.1
b) Data processing 7.2
Technical support c) Data storage 7 7.3
d) Development and testing 7.4
e) Operating tool 7.5
a) Data governance 8.1
b) Data asset management 8.2
c) Data intelligence 8.3
Resource management 8
d) Service decoupling 8.4
e) Domain model 8.5
f) Service extraction 8.6
a) Data service 9.1
b) Data operation 9.2
Capability exposure c) Data portal 9 9.3
d) Service integration 9.4
e) Service delivery 9.5
a) Collection interface 10.1
Interface 10
b) Delivery interface 10.2
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
6.5 Case analysis
Based on the comparison, the similarities and differences of the implementation can be easily identified, which
serve the process of generating the insights, including the whole picture, the key points, the good practices of
the implementation for every requirement.
7 Case introduction
7.1 Overview
After three-year case collection since 2022, six SCDPs (one from Spain, two from the Republic of Korean, and
three from China) have been gathered. Established and maintained for more than four years, these SCDPs
represents the innovative explorations and achievements of their own country to make the city smart and use
digital solutions providing better services.
GivernGiven the different characteristics of different SCDPs, the collected cases can be divided into two types.
One is horizontal, comprehensive and systematical digital platforms to support the management and
operation of the whole city, and another one is vertical application focusing on domain-specific topics in smart
cities, like smart transportation. Table 2 shows the basic information of the collected cases relevant with
[2]
ISO/IEC 24039:2022ISO/IEC 24039:2022 .
Table 2 — Collected cases relevant with ISO/IEC 24039
Source
Case
Name Type
No.
Country city
Case 1 València City Platform horizontal Spain València
Case 2 Smart Chengdu Digital Platform horizontal China Chengdu, Sichuan Province
Case 3 Daegu Smart City Data Hub horizontal Republic of Korea Daegu
Case 4 Henan Smart Grid Digital Platform vertical China Zhengzhou, Henan Province
Case 5 Anyang IoT-based Smart City horizontal Republic of Korea Anyang
Case 6 Jinan Transportation Brain Project vertical China Jinan, Shandong Province
7.2 Case description
7.2.1 València City Platform from Spain
València is already a benchmark as a smart and sustainable city, which is inseparable from the adoption of
digital technologies and advanced devices. In order to promote data collection and data availability, it is
necessary for cross-sectors to apply the integral and holistic approaches to carry out smart city management.
Under this circumstance, the Valencia City Council has launched the VLCi Platform to centralize data on
municipal services for the purpose of improving and rationalizing the governance model of smart city.
The technical requirements are as follows: to provide Open Platform with open APIs without author royalties,
to construct based on standards and open technologies, to integrate data from several horizontal elements, to
interoperate with heterogeneous technologies and devices, to enhance high-performance data processing, to
meet high scalability, availability & resilient requirements, and to protect data security and privacy. As for the
technical architecture, València City Platform consists of access & standardization, storage & analysis,
visualization, and interoperability, among which “access & standardization” means the process of data access
and data consistency after collecting data from diverse data sources, “storage & analysis” uses databases, big
data, CKAN and Context Broker to realize data storage and data processing, “visualization” presents data
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
through dashboards, business intelligence and open data portal, at last, “interoperability” refers to smooth
communication among data services.
With regard to the mapping results with ISO/IEC 24039, València City Platform is in consistent with the SCDP
reference architecture and has met most of the corresponding requirements except for operating tool, data
intelligence, service decoupling, domain model, service extraction, service integration, together with service
delivery.
The construction duration for València City Platform is eight years from 2013 to 2020, which includes the
strategy planning in 2013 for the first stage, the implant since 2014 for the second stage, providing the city
with new solutions in five smart areas since the end of 2016 for the third stage, and the iteration until 2020
for the fourth stage. And the relevant stakeholders consist of València Smart City Office responsible for
platform management, operation and maintenance, València City Council representatives and other public
servant users to access data, and universities & other entities who use and provide data simultaneously.
The technical innovation or achievements have contributed to the improvement of current situation in terms
of holisticness, modularity, reusability and security. Specifically, this project is beneficial to conduct integrated
data management, provide scalable solutions for data from various domains, adopt existing mature
1)
technologies schemes like FIWARE standard, and guarantee the protection of data security & privacy on the
platform.
7.2.2 Smart Chengdu Digital Platform from China
Nowadays, as cities increasingly face interconnected challenges, there is a growing need for the coordinated
and scalable governance solutions. With the adoption of the advanced information technology in smart cities
accelerating the digitalization of all urban elements, the ability to integrate the fragmented resources and
provide cross-domain support at the city level has become crucial for enabling the systematic governance.
Under this background, Smart Chengdu Digital Platform has been developed by incorporating the seven
modules of Data Resource Platform, CIM Platform, City Operation Platform, City Digital Vital Sign Platform, AI-
enabled Platform, IoT Perception Platform, Video Fusion Platform to support the agile and scientific
governance for the megacity of Chengdu.
The technical requirement is to apply the methods like J2EE framework, micro-service framework, front-end
and back-end separation, provide functions like data collection, data governance, data sharing, data security,
data service portal, and support integration through unified authentication, unified operation, maintenance &
monitoring. As for the technical architecture, Chengdu Data Resource Platform consists of the governmental
big data resources for conducting data integration from all the governmental data sources, the capability
support encapsulating services into the reusable capabilities for invocation, and the smart management
service to support urban operations and management.
With regard to the mapping results with ISO/IEC 24039, Smart Chengdu Digital Platform is in consistent with
the SCDP reference architecture and has met most of the corresponding requirements at the general level.
Given that the seven sub-platforms are designed for dedicated purposes, however, no single platform can
cover all the capabilities in ISO/IEC 24039, and everyone has itstheir own priorities.
The Smart Chengdu Digital Platform was initiated since 2022, which can be divided into three stages, including
the first stage for the planning and design in early 2022, the second stage for the development and deployment
by the end of 2022, and the third stage for the iteration since 2023. And the relevant stakeholders are
composed of Chengdu Municipal Office of Urban Operations and Governmental Services Management in

1)
FIWARE is an open-source IoT platform funded by European Union. This information is given for the convenience of
users of this document and does not constitute an endorsement by ISO and IEC of the product named. Equivalent products
maycan be used if they can be shown to lead to the same results.

© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
charge of the overall planning, coordinate implementation, and operational management, all the municipal
and district-level governmental departments acting as both data providers and service consumers, and other
relevant stakeholders from the research institutions, IT service vendors, along with the public.
The technical innovation or achievements have contributed to the improvement of current situation in terms
of holisticness, transparency, and security. Specifically, the platform is beneficial to conduct the integration,
governance, and use of city-wide various data, converge and orchestrate the multi-dimensional city elements,
as well as initiate early intervention in risks for resilience enhancement across all the core seven components.
7.2.3 Daegu Smart City Data Hub from the Republic of Korea
Before the implementation of the Smart City Data Hub, urban data in Daegu were managed by individual
systems with limited interoperability. From 2018 to 2022, the Government of the Republic of Korea
implemented a large-scale national R&D and pilot program to accelerate data-driven smart city innovation.
Jointly led by the Ministry of Land, Infrastructure and Transport and the Ministry of Science and ICT, the
program aimed to develop a standard-based city data platform, called Daegu Smart City Data Hub, and validate
its applicability through urban testbeds in Daegu and Siheung. The initiative sought to establish an
interoperable digital foundation for collecting, sharing, and analyzing urban data across domains such as
transportation, safety, environment, and administration.
The Smart City Data Hub was conceptualized as a core enabler of a data-centric smart city ecosystem. Its
design adopted international industry standards including ETSI NGSI-LD for context information management
and linked data exchange. By combining these standards with modular software architecture and an open API
framework, the Smart City Data Hub enabled syntactic and semantic interoperability among heterogeneous
urban systems and facilitated the creation of cross-domain services and data marketplaces. Daegu was
selected as the principal demonstration city to test the Data Hub in real urban operations. Within Daegu Smart
City Centre, a city-wide platform was deployed to collect and analyze data from public transportation, CCTV
networks, public facilities, and legacy administrative systems. More than a hundred datasets were integrated
to support data-driven services.
The technical requirements have covered the microservice-based and cloud-native structure as well as the
interoperability, modularity, and the mash-up or cross-domain services for data management, data collection,
data analytics, data service, cloud management, security and semantics as well as overall ones. As for the
technical architecture, Daegu Smart City Data Hub consists of infrastructure and security, data ingestion, data
core management, semantic and analytics enablement, and capability exposure through APIs and portals,
among which infrastructure and security modules focus on providing the execution environment and conduct
the access control and security governance, data ingestion is for integrating heterogeneous urban data, data
core management function enables the integrated datasets management, the semantic and analytics
enablement contribute to the standardized representation of urban entities and the relationships as well as
the cross-domain data analysis, and the capability exposure through APIs and portals provide standardized
interfaces for integrated datasets consumption.
With regard to the mapping results with ISO/IEC 24039, Daegu Smart City Data Hub is in consistent with the
SCDP reference architecture and has met all the corresponding requirements.
Daegu Smart City Data Hub was implemented in phased steps. Specifically, the phase one of 2018–2019
focused on the top-level design and planning verification, the phase two of 2020–2021 was for platform
development and infrastructure implementation, and the phase three of 2022 conducted the deployment and
operational transition. And key stakeholders consist of the city government conducting platform governance
and operation, service departments providing urban services based on data, system integrators in charge of
platform development and maintenance, and consumers of urban data.
As for the technical innovation or achievements, Daegu Smart City Data Hub has contributed to the
improvement of holisticness, modularity, transparency, reusability, and security. The Daegu pilot
demonstrated how a standards-based data platform can enable systematic integration of IoT and legacy data,
© ISO/IEC 2026 – All rights reserved
ISO/IEC CD TRDTR 25811:2026(en)
improve urban service efficiency, and enhance citizen participation through open data portals. The hub’s
modular and copy-and-deploy structure allowed replication to neighboring municipalities such as Gyeongsan,
Gumi, and Pohang, laying the groundwork for regional data sharing and federated smart city operations.
Overall, the Smart City Data Hub initiative established a national reference architecture for data-driven urban
innovation in Republic of Korea. By combining standardized data interfaces, linked-data models, and an open
ecosystem approach, it provided a sustainable model for scalable and interoperable smart city services.
7.2.4 Henan Smart Grid Digital Platform from China
With the rapid development of smart cities, real-time power big data has generated widely. Acting as the
critical data resource, it has played the important role in supporting the decision-making for the management
and governance of smart cities. In order to enable the power big data value realization in smart cities, it is
necessary to develop the digital platform in the power field.
In view of this, Henan Smart Grid Digital Platform was put forward to cover the closed-loop system of
"collection, storage, calculation, management and use" for integrated data and unified service by data
governance, asset management, and safety monitoring.
The technical requirement is to apply the cloud-native technology stack to perform the standardized ETL,
unified metadata management, data service registration and release mechanism, and intelligent hierarchical
con
...