一些性能测试表明，解析大于2 KB的文档时增加输入缓冲区的大小能够提高性能。
Some performance tests have showed that increasing this input buffer size improves performance when parsing documents larger than 2 KB.
一旦输入向量通过了“大小相等”和“值大于1”测试，就执行算法的核心部分。
Once the input vectors have passed the "equal size" and "size greater than 1" tests, the heart of the algorithm is executed.
可能包含负值的数字列(例如col_E)使用一个xsl： when语句进行测试，看它的文本值小于0还是大于0。
Numeric columns that could be negative (for example, col_E) are tested using a XSL: when statement to see if its text value is less than or greater than 0.
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