internal IfcBooleanResult(DatabaseIfc db, IfcBooleanResult b) : base(db,b) { mOperator = b.mOperator; FirstOperand = db.Factory.Duplicate(b.mDatabase[ b.mFirstOperand]) as IfcBooleanOperand; SecondOperand = db.Factory.Duplicate(b.mDatabase[b.mSecondOperand]) as IfcBooleanOperand; }