联邦数据库系统具有分布性、异构性、自治性、透明性的特点。
Distribution, heterogeneity, autonomy and transparency are the most important characteristics of Federated Database System.
该解决方案通过建立统一的数据模型，使用元数据与多数据库系统实现了对分布的异构的空间数据的统一访问请求服务。
Based on the unified data modeling, this resolution realizes the uniform request service to distributed heterogeneous spatial data by metadata and multi-database system.
并以正在研发的数字矿井项目中的安全信息管理模块为例，介绍了基于CORBA的异构分布式数据库系统的实现方法。
Then the security information management model in the SKJ2004 project is taken as an example to describe the implementation process of heterogeneous distributed database systems based on CORBA.
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