DKG Edge Node architecture

The DKG Edge Node is intended for customisability and extensibility. Its official code is available as a project "boilerplate," and builders can extend it to fit their needs.

The DKG Edge Node is based on a SoA architecture, providing multiple services designed for the separation of concerns. See the block scheme below for a high-level overview of the architecture

The following table describes each of the services and links to their respective repositories:

Service	Description	Github repo
Knowledge Mining API	Performs knowledge mining via knowledge mining pipelines, taking in various input formats to ultimately produce serialized outputs (JSON-LD), intended to then be published via the Publishing Service	https://github.com/OriginTrail/edge-node-knowledge-mining
dRAG API	dRAG (Decentralized Retrieval-Augmented Generation) is a service for building decentralized RAGs using data from the Decentralized Knowledge Graph (DKG). It enables querying and processing data with tools like SPARQL, LLMs, and vector databases, delivering answers from decentralized, verifiable sources.	https://github.com/OriginTrail/edge-node-drag
Edge Node User Interface	The UI for accessing and utilizing all Edge Node functionalities.	https://github.com/OriginTrail/edge-node-interface
Edge Node API	The Edge Node backend serves as the orchestrator, coordinating operations and interactions between various services.	https://github.com/OriginTrail/edge-node-api
Knowledge Graph DB Instance	An instance of an RDF enabled triple store, such as Amazon Neptune, Ontotext Graph DB, Blazegraph, Apache Jena or others.	Respective project repos
LLM services	Large Language Model services used by the Edge Node and chosen by the developer, enabling utilizing either local or external LLM based services (e.g. Ollama, OpenAI, Claude etc)	Respective project repos
Publishing Service	Responsible for creating Knowledge Assets on the DKG, intended to take inputs from the Knowledge Mining API	Part of Edge Node API repo
Authentication Service	Acts as the authentication hub for all Edge Node services and serves as the central source for global configuration and custom parameters.	https://github.com/OriginTrail/edge-node-authentication-service
Blockchain interface	The Edge Node communicates with the blockchain through an array of RPC endpoints configurable by the user.	No specific repo, please consult the documentation on setting up nodes and RPC endpoints
DKG V8 Network Engine (ot-node)	Network runtime service, responsible for communicating with other DKG nodes	https://github.com/OriginTrail/ot-node
Operational DBs	Various small databases used for operational purposes	Deployed with respective services