The status column has four defined values: - 'valid(1)', which indicates that the conceptual row is available for using by the managed device; - 'createRequest(2)', which is supplied by a management station wishing to create a new instance of a conceptual row and to have its status automatically set to valid(1), making it available for using by the managed device; - 'underCreation(3)', which indicates that the conceptual row is existing in the managed device but not working. - 'invalid(4)', which is supplied by a management station wishing to delete all of the instances associated with an existing conceptual row.