命名文件系统属性分类是一个关联到目录或者文件的字节流，通过一个字符串名引用。

The named file system attribute classification is a byte stream that is associated with a directory or file and is referred to by a string name.

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文本(Text)—不属于其他分类的一组由字母数字组成的字符串值。

Text-a set of alphanumeric string values that do not fit other classifications.

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注意，在这种情况下，目录约束需要指定字符串 “rulebased” 作为分类法 ID。

Note that category constraints need to specify the string "rulebased" as a taxonomy ID in that case.

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