Timbr is not a database. Timbr is a platform used for creating virtual SQL Knowledge Graphs that enable semantic (ontology-based) graph capabilities on existing data engines (data warehouses and data lakes). The SQL Knowledge Graphs integrate data sources into a semantic data fabric queryable in SQL. Timbr does not require to copy or transform data (no ETL operations), no new DBMS infrastructure and no new skills as required by graph databases.