Note: on UNIX, the data file names are case sensitive and MUST be lower case.
注意：在UNIX上，数据文件名称区分大小写，而且必须为小写。
The attribute name is case-sensitive, and its data type should be an integer.
属性名称有大小写的区别，且数据类型应为整数。
The attribute name is case-sensitive, and its data type should be an integer.
属性名称有大小写的区别，且数据类型应为整数。
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