A kind of technology is introduced, which USES meta-data in database management system to make clear data structure which is unknown in closed module.

提出一种通过数据库管理系统中的元数据来确定封闭模块中未知的数据结构的技术。

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Existing database management system cannot efficiently support biological sequence data type and its operations, people have to use text data type in database management system or text file directly.

当前的数据库管理系统不能有效地支持生物序列数据类型和操作，人们不得不用文本数据类型或直接使用文本文件存储生物序列数据。

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Instead of trying to revamp JIMS with brand-new technology, Harris County has stuck to its grand-design architecture by migrating its legacy database to the more current Model 204 Database Management System, made by Computer Corporation of America, and rewriting Cobol applications in the Model 204 language.

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