'SET' must be a type

I created the following types :

CREATE TYPE Adress AS Object (Street varchar2(50), PostalC number, Ville varchar2(50));
CREATE TYPE PhoneNumber;


A person can have a set of PhoneNumbers, when I try to create the Type Person :

CREATE TYPE Person AS Object (FirstName varchar2(50), LastName varchar2(50), Adr Adress, Mobile SET(PhoneNumber));


I get the following error :

Errors: TYPE PERSON Line/Col: 0/0 PL/SQL: Compilation unit analysis terminated Line/Col: 1/90 PLS-00488: 'SET' must be a type
​

Continue reading...