在关系数据库系统内部，应用程序和实际数据库之间的主要交互都是以会话或连接的sql语句形式来实现的。
Within a relational database system, most interactions between an application and the actual database are in the form of SQL statements within a session or connection.
DMS总是以同一种格式(数据图)返回信息，它隐藏了实际的数据存储信息，在SDO应用程序和EIS之间提供了一层数据提取的功能。
As a DMS always returns the information in the same format (a data Graph), it hides the actual data storage and provides a level of abstraction between the SDO application and the EIS.
如果现有的应用程序实际能在另一个应用服务器上运行，那么最好的办法是以尽可能少的改动使它运行在WebSphere Application Server上。
If the existing application actually runs on the other application server, the best approach is to get it running in WebSphere application server with the minimal number of changes possible.
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