14. A system for creating a relational database schema, comprising: at least one processor programmed to: access a reference ontology comprising a first number of concepts and a second number of properties, the first number of concepts arranged in a hierarchy with each of the second number of properties being associated with at least one of the first number of concepts; enable a user to select a first set of concepts from the reference ontology, and adapt the relational database schema, by a user interface; automatically determine a first set of properties from said second number of properties, associated with the selected first set of concepts; automatically and repeatedly determine a further set of concepts from the first number of concepts, and associated with the determined first set of properties, until all concepts associated with the determined first set of properties are determined; and generate a relational database schema comprising a number of tables, of which at least one table pertains to a concept of said further set of concepts.
14. A system for creating a relational database schema, comprising: at least one processor programmed to: access a reference ontology comprising a first number of concepts and a second number of properties, the first number of concepts arranged in a hierarchy with each of the second number of properties being associated with at least one of the first number of concepts; enable a user to select a first set of concepts from the reference ontology, and adapt the relational database schema, by a user interface; automatically determine a first set of properties from said second number of properties, associated with the selected first set of concepts; automatically and repeatedly determine a further set of concepts from the first number of concepts, and associated with the determined first set of properties, until all concepts associated with the determined first set of properties are determined; and generate a relational database schema comprising a number of tables, of which at least one table pertains to a concept of said further set of concepts. 17. The system according to claim 14 , wherein the at least one processor is programmed to: generate a relational database from the created relational database schema.