A simple schema: person.odl

enum CivilState {

Lady = 0x10,

Sir = 0x20,

Miss = 0x40

};

class Address {

attribute char street[];

attribute char town[32];

};

class Car {

attribute char brand[];

attribute int num;

};

class Person {

attribute char name[];

attribute int age;

attribute Address addr;

attribute CivilState cstate;

relationship Person *spouse

(inverse<Person::spouse>);

attribute set<Car*> *cars;

attribute Person *children[];

};

class Employee extends Person {

attribute long salary;

};

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