Configuration

The authoritative configuration is backend/src/main/resources/application.yml. Every value can be overridden at runtime with environment variables using Spring Boot's standard mapping (dots → underscores, uppercase). The compose file sets DATABASE_DATABASETYPE, DATABASE_DEFAULTDATASET, and DATABASE_HTTP_ENDPOINT this way.

Commonly adjusted settings

Purpose	Property	Default
Snapshot store endpoint	database.http.endpoint	http://localhost:3030
Default dataset name	database.defaultDataset	default
Frontend URL (CORS allow-list)	frontend.url	http://localhost:1407
API base path	frontend.accessRoute	/api
Max uploaded schema size	spring.servlet.multipart.max-file-size	50MB
History depth per graph	graph.maxVersions	256
Diagram renderer	rendering.renderer	svelteflow (or mermaid)
Session cookie name	server.servlet.session.cookie.name	RDFA_SESSION_ID
Session cookie secure flag	server.servlet.session.cookie.secure	false (set to true in production)

Frontend runtime config

The frontend is a static SPA with one runtime variable, rewritten at container start by frontend/docker-entrypoint.sh:

Variable	Default (Docker)	Description
PUBLIC_BACKEND_URL	/api	Where the frontend expects to find the backend.