External Database Access的意思|示意

That is, rather than using VFS technology to access existing external resources, it manages a special-purpose database, internal to the application, as a complete filesystem.

也就是，不是使用VFS技术去访问现有的外部资源，而是要将一个特殊用途的数据库(位于应用程序内部)当作一个完整的文件系统进行管理。

Multiple versions of J2EE application components, such as entity beans that access the same external database, could have synchronization issues while modifying the same table or row.

不同版本的J2EE应用程序组件(例如访问相同外部数据库的实体bean)在修改相同的数据表或数据记录的时候会存在同步问题。

Data storage and management, and the external user how to access data are all depend on the functions provided by database, so spatial database functions is the key part of the spatial database.

空间数据库功能是数据库的关键部分，数据库内部的数据存储与管理，外部用户如何使用这些数据，都是靠功能来实现的。

However, the solution now needs to be deployed in a production environment and access to the external database is to be restricted by setting up a Virtual Network.

然而，现在的解决方案需要在生产环境中部署和访问限制到外部数据库通过建立一个虚拟的网络。