Presentation made at the 30th International Electrotechnical and Computer Science Conference ERK 2021
Title: ONTOCHAIN - A new software ecosystem for trusted, traceable & transparent ontological knowledge
The Semantic Web and Blockchain at a Meeting Point
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A new software ecosystem for
trusted, traceable &
ERK Conference 2021 - 21/09/2021, Portorož,
University of Ljubljana
The Semantic Web and
Blockchain at a Meeting Point
ONTOCHAIN 7 CORE PARTNERS
ONTOCHAIN - Trust traceable and transparent ontological knowledge on blockchain, is
a European project funded by the European Commission under the European Union’s
Horizon 2020 Research and Innovation Programme, and part of the European
Commission’s Next Generation Internet (NGI) initiative.
ONTOCHAIN was launched in September 2020 to empower innovators and
end users through 3 Open Calls to develop blockchain-based knowledge
management solutions that will be part of a novel software ecosystem for a
better share of knowledge and value.
HOW? WHERE DO WE STAND?
✔3 Open Calls with up to Up to 4,2 M € funding
❖ OC1 Research : Design
Specifying the ONTOCHAIN framework as human centric decentralised & trustworthy
solution based on available technologies. A first batch of specifications have been
delivered by 17 Teams in phase one of the call and 7 remaining Teams will delivered the
full ONTOCHAIN framework in September 2021.
❖ OC2 Protocol suite and software ecosystem foundations : Implementation
Building the ONTOCHAIN concept for the creation of a trustworthy information/service
exchange process & a more trustworthy content handling. This call aims to deliver the
ONTOCHAIN Framework prototypes.
❖ OC3 Application and experimentation : Deployment 2022
✓ Participate in the generation and use of knowledge like never before.
✓ Digital life is an extension of our physical world.
Centralization of power
Unknown provenance of information
Anonymity and unreliable identities
No fair rewards for good quality contributions
➢ The way knowledge is generated, curated and stored raises effectively some
concerns and it is the time to handle our digital life with the same critical, moral
and ethical thinking that we use in our physical world
The internet of the future should be more
Resilient Trustworthy Sustainable
ONTOCHAIN approach is to leverage Semantic Web
and blockchain assets to built as a distinct added
value for the next generation internet.
Set of technologies that focus on
data, i.e., how they are
described, modelled, and linked.
A technology that aims at
storing data and share such data
among a set of peers, who
validate the content without the
intervention of a third-party
Trustworthiness is achieved by standardised storage and ontologies on one hand
as well as on the other hand by the decentralisation and data immutability
▪ Addressing the information needs of
semantically complex, dynamic, trust-
▪ Trusted data, metadata, ontology,
knowledge and information
▪ Ontologies + Blockchain
▪ Permissioned, Regulated by the
▪ Fostering plurality and democracy
▪ Trusted, on-chain approaches
▪ Trustless, off-chain approaches,
▪ Expected outcome:
▪ New ONTOCHAIN application design
▪ New ONTOCHAIN software ecosystem
❖Shall the door of our home automatically open
to an unexpected visitor?
❖Should I borrow my car to my neighbor?
❖Who will gain access to my video stream for
❖Can we trust the sensors and the traffic lights
on the smart crossing?
❖Can we trust the documents in the archive?
❖When I move my smart car from Ljubljana to
Vienna what happens with my transactions?
❖Who can access my files?
Trust-critical use cases
❖ Multi-layer and modular technology framework
❖ Address the various challenges of the Next Generation
❖ Different protocols and interactions between different
❖ Enable higher performance and scalability
❖ Transparent content and information exchange as well
as service interoperability
❖ Building block of NGI towards a more human-centric
ONTOCHAIN STRATEGIC OBJECTIVES
❖ Reputation management
Generic decentralized reputation management functionality in the blockchain and
different decentralized reputation models
❖ Trusted data semantics
Bring data semantics in the blockchain framework, so as to track data provenance,
data handling and data manipulations throughout the data lifecycle.
❖ General data protection and marketplaces based on trusted knowledge and
Address several challenges to unlock the tremendous potential of blockchains,
especially before this paradigm shift becomes technically, economically and legally viable in
❖ On-block storage of ontologies,
❖ Information replication based on
❖ Possibility for split and join operations
❖ Quality of Service managements with
trade-offs for ONTOBLOCKs: in
memory, temporary usage of blocks,
storage for indefinite time, number of
replicas versus storage cost etc.
❖ Trusted approaches for ontologies and
❖ Trusted approaches for data
❖ People, resources
❖ Data, Metadata, Knowledge,
❖ Internet of Things
❖ Microservice containers
❖ Edge-to-Cloud infrastructures
❖ Artificial Intelligence algorithms
❖ Digital Twins
THE KNOWLEDGE BLOCK TREE AND FOREST
Trees of ONTOBLOCKs may form a Knowledge Block Forest
❖ Designed for indefinite usage
❖ Supporting services for continuous Knowledge Block Forest operation:
❑ ONTOBLOCKS split & join
❑ ONTOBLOCKs archiving
❑ ONTOBLOCKs defragmentation
❑ In memory ONTOBLOCKs
❑ High security ONTOBLOCKs
❑ Moving blocks vertically or horizontally
❑ Local versus Global decision making
❖ Geographic mapping of ONTOBLOCKs
❖ Top blocks have much higher security, are kept in memory, regularly
copied between countries
❖ Trust in the provided information!
ONTOCHAIN FRAMEWORK :
MAPPING ACCORDING TO THE 3 OPEN CALLS
At the end, ONTOCHAIN will deliver a complete software ecosystem and novel,
ambitious Distributed Ledger Technology (DLT) applications in areas such as :
❖ Trustworthy web and social media
❖ Trustworthy crowdsensing
❖ Trustworthy service orchestration
❖ Decentralised and unsupervised online social networks
Successfull : if this ecosystem of innovative applications is widely and sustainably
adopted by vital sectors of the European economy.
That is our intention!
AND GET INVOLVED!