最后，论文介绍了异构数据交换的实现过程。
Finally, the paper introduced the process of heterogeneous data exchange.
现有的异构数据库中间件已不能完全满足网络信息系统应用的上述需要。
Current heterogeneous database middleware cannot meet the need of network information system application said above.
传统异构数据库间的数据转换工具存在受平台限制、容易产生冗余等不足。
Traditional data transformation tools are constrained by the platform and easily lead to data redundancy.
异构性：每条“记录”可以包含不同的数据字段。
Heterogeneity: Where each "record" can contain different data fields.
为异构系统的数据交换模式进行了有益的探索。
The paper explores data exchange mode for isomeric system profitably.
数据迁移的主要困难在于数据的异构性。
The main difficulty of data migration is data heterogeneity.
NET技术实现对远程异构地籍数据库的访问。
NET technology to achieve remote access to heterogeneous cadastral database.
NET技术实现对远程异构地籍数据库的访问。
NET technology to achieve remote access to heterogeneous cadastral database.
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