Broad file system, compoundfile and email support.
广泛的文件系统，复合文件和电子邮件支持。
2
Better control over manual indexing and index writing (RAM consumption, non-compoundfile format flag etc).
更好的控制手工索引和索引编写（RAM使用、非混合的文件格式标志等等）。
3
Some software implementation technology is adopted, such as object oriented programming technology, vector matrix encapsulation technology, structured storage and compoundfile technology, and so on.