Source Data Listing 来源数据列表
Return briefly to Listing 4, where you defined the data source for the table as the controller. This means that the controller has some data source methods to implement; Listing 6 shows those.
简要回顾一下清单 4，您在那里将数据表的数据源定义为控制器，那意味着控制器有一些数据源方法需要实现，如 清单 6 所示。
Your goal is to transform the source XML data from Listing 2 into KML like that in Listing 3.
您的目的是将清单2中的源xml数据转换为清单3所示的KML数据。
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