db/schema.cds
CDS
namespace com.logaligroup;

using {cuid} from '@sap/cds/common';

entity Employees : cuid {
    numberDocument : String(9);
    firstName      : String(40);
    lastName       : String(40);
    toContacts     : Composition of many Contacts
                         on toContacts.employee = $self;
};

entity Contacts : cuid {
    email       : String(120);
    phoneNumber : String(14);
    employee    : Association to Employees;
};