Embodiments of the present invention relate to computer systems, methods and programs for storing a set of data obtained from a data source, the set of data comprising a set of attribute or field names and respective attribute or field values. The computer system may comprise means for storing object type definitions, each object type definition comprising an object type name and at least a set of defining characteristics and a set of role names, and means for storing role definitions, each role definition comprising a role name and at least a set of controlling characteristics. Further, the computer system may include means for storing a list of prioritized finding rules, each finding rule comprising a condition for application to values of the set of data and one of the object types that is returned when the condition is fulfilled, means for storing objects that are instances of the object types, and means for storing mass data referring to objects; and a set of inbound interfaces.