如果这样做就很困难：以xsd： int填充字段开始，以后才决定他应该是字符串。
It's much more difficult, say, to start with an XSD: int filler field and decide later that it should have been a string.
如果您省略了第二个数字，那么sort会假定键是从给定的字段开始，一直到每一行的末尾。
If you omit the second number, sort will assume that the key starts at the given field and continues to the end of each line.
本书中的模式是以散文形式写就的，涵盖的内容从何时应该在类中创建一个数据字段开始，到判等方法(equality method)，再到子类化过程，全部包括在内。
The patterns are written in essay format and cover everything from when you should create a data field in a class, to equality methods, to subclassing. The patterns are grouped into chapters by.
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