A computer implemented method for creating and managing a database system comprising data structures for storing, in a memory, data and relations between the data, the method comprising the steps of creating a mind map structure wherein each node of the mind map represents a set in the first data structure and each branch represents a relation in the fifth data structure of the database in which there are defined five data structures that hold all information relating to tables, records and relations, namely: a first data structure comprising a definition of at least one data set, a second data structure comprising definitions of properties of objects, a third data structure comprising definitions of objects, a fourth data structure comprising definitions of properties of each object, a fifth data structure comprising definitions of relations and a sixth data structure for storing definitions of relations between objects.