Builds RDF/OWL ontologies from relational database schemas across eight connectors including PostgreSQL, Snowflake, BigQuery, and DuckDB. The ontology includes SQL annotations that map OWL classes and properties back to actual tables, columns, and foreign keys. Exposes GraphRAG for semantic schema discovery, a SPARQL 1.1 query interface via Oxigraph, and deterministic OBQC validation that catches table/column mismatches, invalid joins, type errors, and fan traps before SQL hits the database. Also generates Plotly charts with MCP UI rendering. Reach for this when you need Text to SQL with structural guarantees, or when you want semantic layer tooling that understands relationships and prevents Cartesian products through ontology aware validation rather than hoping the LLM gets it right.
claude mcp add --transport stdio ralfbecher-orionbelt-analytics uvx orionbelt-analytics