The RentalLocation has to obtain this existing information from our on-line Reservation RDBMS, and in Step 6 I have added a new design class, DataAccess, that implements the Façade pattern.
RentalLocation必须从在线的预约RDBMS获得这些已有信息，在第6步我加入一个新的设计类DataAccess，来实现Facade模式。
The created pattern is supported through the structural frame elements, carrying the building's façade and generating interesting elegant views through the tower.
支持创建的模式是通过结构框架元素，承载建筑的外立面，通过有趣的塔优雅的意见。
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