Because a file was written and read according to definitions within the program code, there was no external data definition, making data sharing difficult and AD hoc reporting impossible.
由于是根据程序代码内的定义读写文件，没有外部数据定义，这使得数据共享很难且不可能进行专门报告。
Reduction of return data based on better definition of metadata (using External tables).
根据更好的元数据定义减少返回数据(使用外部表)。
Data source: clear definition of current available business and external data sources and future data sources if possible.
数据源：当前可用的业务数据源和外部数据源以及将来可能存在的数据源的清晰定义。
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