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Specialist Task Force 627 (Ref. Body: ISG CIM):
Data-handling Improvement

Who we are:


Team Leader:
  • Giuseppe Tropea,  CNIT,
Team Experts:
  • Franck Le Gall, EGM,
  • Ahmed Abid, EGM,
  • Jason Fox, FIWARE,
  • Alberto Abella, FIWARE,
  • Chandra Challagonda, FIWARE,
  • Andrea Detti, CNIT,
  • Giuseppe Tropea, CNIT,
  • Seongyun Kim, KETI,
  • Marco Cavalli, SFERA,

What we do

The work from ISG CIM is gaining interest in several domains. An acceleration of NGSI-LD adoption is appearing in domains such as smart cities, agriculture, utilities.
At the EU level, several initiatives such as the European Data Spaces and Gaia-X, and, at the international level, the Indian Urban Data Exchange (IUDX) program sponsored by the Indian Central Government and the South-Korea's smart city pilot program, are building upon NGSI-LD.
But further challenges, such as digital transformation and green transformation, for counterbalancing climate-change, require more control by Citizens over their personal data. Practical and commercial re-use of data requires tracking the ownership and allowed re-uses, in verifiable ways: not only to detect "fake news" but also "badly collected data" or "incorrect attribution of data", which can lead to wrong or dangerous conclusions by humans or by AI systems.
Ultimately, the goal of the STF is to accompany all such initiatives, that may build upon NGSI-LD, by expanding both adoption and capabilities of the NGSI-LD standard in the directions mentioned above.
Specifically, this STF improves on four aspects of NGSI-LD data-handling:
1)    connecting existing information structures (ontologies and taxonomies) that already have value in society, smart community platforms and industry platforms;
2)    leveraging the NGSI-LD protocol for exchanging such data/metadata;
3)    providing guidelines and means to reliably and verifiably record and exchange provenance information about the data sources and processing means;
4)    improving interworking with existing (e.g. oneM2M) platforms for IoT data collection and for accessing Linked Open Data.;
These improvements will make NGSI-LD more accessible and open to the new challenges of the EU digital transformation.

For more details, see our Terms of Reference

Why we do it

The activity to be performed by this STF directly relates to the ISG mission of enabling cross-domain interoperability of data sharing. It supports the ETSI Strategy to develop standards that enable a sustainable and securely connected society to:
•    create high quality standards for global use and with low time-to-market, and
•    establish leadership in key areas impacting members’ future activities.
This action is of strategic interest for ETSI because of the potential to attract new members in the SmartCity, SmartAgriculture domains and in particular organisations associated with ongoing large government projects in Europe as well as India, South Korea and Japan.
Moreover, there is a huge social and market impact of data, in positive or negative ways, depending whether the data is not reliable or not reliably used. We can literally no longer imagine modern life without digital data, and if the data exchanged is inaccurate, wrong or not-findable, the value-at-risk is increasingly vast.

How we do it

This STF envisions 5 Tasks. Except for Task T0 which deals with project management, all tasks are independent and target a different purpose.
•    Task T0 - Project management
•    Task T1 - Develop specification for handling of provenance information in NGSI-LD
•    Task T2 - Develop guidelines for use of NGSI-LD in Smart cities and Communities (SCC) data platforms
•    Task T3 - Develop guidelines for usage of external data models with NGSI-LD API
•    Task T4 - Study possibilities and limitation of interworking of NGSI-LD on top of the oneM2M platform
The various Tasks will produce a number of deliverables. Milestones are defined, serving as periodical control points.
STF will report about each milestone to the ETSI ISG CIM, according to the planned timeline, at the regular ISG meetings. Additional dates can be agreed with the ISG officials for further, continuous reporting.

Interactions are foreseen with ETSI Reference Bodies and other stakeholders.
ETSI Reference Bodies:
•    ETSI TC SmartM2M: interactions are foreseen to gain feedback from SmartM2M in respect to the use of SAREF and its cross-domain ontology within a NGSI-LD context. This will mostly take place in the context of task T2 and T3.
•    ETSI TC Cyber: interactions will take place mostly in the context of the proposed task T1 for all topics related to security and privacy management.
•    ETSI ISG SAI: will be consulted regarding threat surfaces for data-poisoning of AI systems and how secure provenance information can mitigate them
Other stakeholders:
•    oneM2M Partnership Project: liaise results of Task4 and present results by invitation to a oneM2M meeting
•    Coalition for provenance and authenticity ( consult regarding their data and process models, as well as use of certificates
•    OGC; consult regarding their data and API specification for geographical information systems
•    W3C: consult regarding their data models for semantic web, as well as use of certificates and definition of Verifiable Credentials
•    other interesting groups for later consideration
o    ISO/IEC JTC1/SC 32 (Data management and interchange): in respect to the work being done on GQL Graph Query Language
o    AIOTI (the Alliance for the Internet of Things Innovation: in particular AIOTI WG on Standardization (

In general, STF627 will:
•    organize periodic internal meetings of the STF to share the latest content produced
•    organize periodic meetings with the STF Steering Commitee to consult on the latest advances or any difficulties
•    attend the ISG CIM meetings and report on its activities, presenting drafts of the latest technical content produced for comments
•    organize reviews of its draft documents by some external stakeholders, in addition to and after agreement with the ISG CIM members
•    organize workshop and participate to events with the scope to disseminate, facilitate and assist the understanding and the adoption of NGSI-LD by the industry and expand the use of cross-domain data models and API for exchange of context information



Work Item code

Standard number

Working title




(GR CIM 018)

Working title: Enabling chain of trust from Content Sources to Content Consumers

Scope: survey and design technical means for enabling a chain of trust from Content Sources to Content Consumers that helps endorsing documents, by connecting or embedding verifiable credentials into NGSI-LD documents.



(GS CIM 019)

Working title: Handling of provenance information in NGSI-LD

Scope: definition, specification and documentation of solutions to verify integrity, and to precisely evaluate attribution and authenticity of NGSI-LD Context Information, throughout its lifecycle.



(GR CIM 020)                                        


Working title: Guidelines for the deployment of Smart City and Communities data platforms

Scope: guidelines for the deployment of Smart City and Communities data platforms based on NGSI-LD context information management and its integration with other platform services (i.e. LOD publication, GIS interaction, IoT layer).



(GR CIM 021)                   

Working title: Usage of external data models with NGSI-LD API

Scope: selection of relevant and representative knowledge organisation systems, to provide an illustrative basis of data schemas and vocabularies relevant to be used in a NGSI-LD context. Illustration of their use with the NGSI-LD API in complex environments, such as system-of-system models for Digital Twins. Provide recommendations for changes or enhancements to the NGSI-LD specification (API and data model).



(GR CIM 022)

Working title: NGSI-LD/oneM2M interworking proxy proposal

Scope: analyse and propose a NGSI-LD/oneM2M interworking proxy, using existing oneM2M features. Where appropriate, provide recommendations to improve the interworking.

Time plan



Task / Milestone

Target date from

to cut-off date


Start of work




Project Management




Specification development for handling of provenance information in NGSI-LD




Develop guidelines for use of NGSI-LD in Smart cities and Communities (SCC) data platforms




Usage of external data models with NGSI-LD API




Study possibilities and limitation of interworking of NGSI-LD on top of the oneM2M platform



Milestone A

Initial detailed outline of deliverables D1, D2 and D4 (early draft) available

Progress report#1 approved by ISG CIM



Milestone B

Stable drafts of deliverables D1, D2 and D4 available

Initial detailed outline of deliverables D3 (early draft) available

Progress report#2 approved by ISG CIM



Milestone C

Final drafts of deliverables D1, D2 and D4 approved by ISG CIM

Stable drafts of deliverable D3 available

Initial detailed outline of deliverables D5 (early draft) available

Progress report#3 approved by ISG CIM



Milestone D

Final draft of deliverable D3 approved by ISG CIM

Stable draft of deliverable D5 available

Progress report#4 approved by ISG CIM



Milestone E

All deliverable published.

Final report approved by ISG CIM

STF Closed



How to contact us

Please use the STF Leader email:

This information is based upon STF working assumptions.

The views expressed do not necessarily represent the position of ETSI in this context.