1. A method for creating a relational database schema, comprising: accessing a reference ontology comprising a first number of concepts and a second number of properties; selecting a first set of concepts from the reference ontology; determining a first set of properties from said second number of properties, associated with the selected first set of concepts; determining a second set of concepts associated with the determined first set of properties; and generating a relational database schema comprising a number of tables, of which at least one table pertains to a concept of said second set of concepts; wherein the method is performed by at least one processor.