Instead, administrators define a single virtual database image to provide programmers with transparent access to diverse data.
管理员可以定义一个单独的虚拟数据库镜像，为程序员提供对不同数据的透明的访问。
Transparent database encryption refers to the encryption and decryption of data in the database, the database access program is completely unaware.
数据库透明加密是指对库内数据的加密和解密，对数据库的访问程序是完全无感知的。
Transparent access between heterogeneous databases has been achieved by templates mapping between XML documents and database schemas.
通过XML文档和数据库模式之间的模板映射，较好地实现了异构数据库之间的透明互操作；
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