Attempting to read the file directly into an XML parser results in an error.

如果试图将文件直接读入一个xml解析器，就会导致错误。

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A few good heuristics based solely on the first few bytes will tell you if a file or stream is likely to be XML, and therefore worth checking further with a parser.

一些基于最初几个字节的较好的启发式方法可以告诉您，一个文件或流是否可能是XML，是否值得让解析器作进一步检查。

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Issue 1 — for a parser to read the XML accurately, the content stored within the XML file had to format entities accordingly.

第1个问题—为使解析器精确读取XML，存储在XML文件中的内容必须对实体进行相应地格式化。

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