Notice that the error handler for the latter undoes the work of the former so that data is not left in an inconsistent state.
请注意针对后者的错误处理程序可撤销前者所做的工作，以使数据不会处在一种不一致的状态。
A special error handler in the client receives this exception and must parse the parser's error message to retrieve the required information!
客户中一个专门的错误处理程序接收这种异常，并且必须在解析器错误消息中检索出需要的信息！
The error handler displays problems with an alert dialog.
错误处理程序通过警告对话框显示问题。
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