NFDI4Objects Graph

Technical architecture and documentation of the NFDI4Objects Knowledge Graph

Components

• n4o-fuseki: RDF triple store
• n4o-graph-apis: web interface and public SPARQL endpoint
• n4o-graph-importer: scripts to import data into the triple store
• lido-rdf-converter: convert LIDO format to RDF

Data flow

See the manual for a data flow diagram.

Installation

Clone this repository or copy file docker-compose.yml, config file config-apis.yml and referenced queries directory to a local directory. Then start a new set of docker containers that make the N4O Knowledge Graph:

docker compose up --force-recreate --remove-orphans -V

To update the locally cached Docker images, first run:

docker compose pull

Usage

By default the web interface of n4o-graph-apis is made public at http://localhost:8000/ and the web interface of n4o-graph-importer at http://localhost:5020/.

Configuration

The following environment variables can be used for configuration:

• PORT - port to publish n4o-graph-apis (public read access)
• IMPORT - port to publish n4o-graph-importer (with write access!)
• STAGE - stage directory (default: ./stage)
• DATA - data directory (optional, default: ./data)

Manual

Das Handbuch zum Knowledge Graphen ist mit quarto erstellt. Die Quelldateien liegen im Verzeichnis manual.

Die HTML-Version des Handbuch kann lokal mit make docs im Wurzelverzeichnis aktualisiert werden und liegt anschließend im Verzeichnis docs. Die publizierte Version unter https://nfdi4objects.github.io/n4o-graph/ wird bei GitHub automatisch aus dem main Branch erzeugt.

License

The content of this repository can be used freely as Public Domain (CC Zero).