Object (types, Body)?

    CREATE OR REPLACE TYPE address_t AS OBJECT
	(houseNumber VARCHAR2(4),
	street VARCHAR2(30),
	town VARCHAR2(30),
	county VARCHAR2(30),
	postcode VARCHAR2(8),
	MEMBER FUNCTION fullAddress RETURN VARCHAR2);

    CREATE OR REPLACE TYPE BODY address_t
        AS MEMBER FUNCTION fullAddress()
	RETURN VARCHAR2 IS
            BEGIN
                RETURN number || ' ' || street || ' ' || town || ' ' || county || ' ' || postcode;
            END;
	END;

    CREATE TABLE citizenAddress
	(citizenAddressID CHAR(5) CONSTRAINT pk_citizenAdd_Addressid PRIMARY KEY,
	citizenid CHAR(5),
	address address_t,
	buyDate DATE,
	sallDate DATE);