There's only one twist: It applies a style sheet to the XML files before copying them.
只有一个窍门：它在复制 XML 文件之前对它们应用了一个样式表。
2
Documents that belong to the second category usually are transformed using a style sheetbefore they are read. And documents that are prepared using the same style sheet will look alike.
属于第二类的文档通常在阅读前用样式表进行转换，并且用同一样式表准备过的文档看起来都很类似。
3
Where you see output.fo, an intermediate XML document had to be translated to fo using a style sheetbefore it was sent to Fop.
在您看到out put . fo的地方，必须在将一个中间的XML文档发送到Fop以前使用样式表将它转换到fo。