Reference

Exact syntax and behaviour: SPARQL functions, configuration keys, and error codes.

Reference pages describe how the machinery behaves — no teaching, no opinion. Every entry of a kind uses the same field order, so entries are quick to scan and compare. To learn a task, start with the Guides instead.

Sections

• SPARQL functions and operators — every function, operator, and property-path operator HornDB evaluates, with signatures and examples.
• Configuration — environment variables, CLI flags, and build-time feature flags that control server and runtime behaviour.
• Errors and diagnostics — the HTTP status codes and error categories the SPARQL endpoint returns today, and what is stable to rely on.