Abstract: A computerized method of populating a database composed of rows with applicability fields and parameter fields in a data structure, and of retrieving the data, such that the database may be used to yield relevant results with a minimum of data entries. In a first step, the method defines a hierarchy of applicability fields to suit a particular business model as well as the associated univocal retrieval process. In a second step, the method substitutes unknown applicability fields with a USUB. In a third step, the method prompts the input of appropriate parameter field values for the rows of applicability fields, including those having one or more USUBs. A retrieval method retrieves the data in the data structure. The invention thus enables the population and data retrieval from a database structure such that the database is useful to yield relevant results with a minimum of data entries.