数字城市元数据服务体系的研究和实践

Building and Implementing Metadata Services Architecture of Digital City

元数据是数字地球的 6大关键技术之一 ,也是数字城市建设和实施的重点内容。基于Web服务技术和标准的研究 ,提出在数字城市的分布异构的网络环境下构建元数据服务体系的技术框架。结合在“数字北京”建设中的元数据服务体系建设的实践 ,详细阐述元数据服务体系的构建 ,指出基于Web服务的元数据服务体系的建设将对数字城市信息资源的组织、管理和共享具有重要现实意义。

Metadata is one of the six key technologies of Digital Earth, which is also an important aspect in building and implementing the Digital City. Based on the technologies and standards of Web Services, the authors came up with a metadata services architecture in the distributed heterogeneous network environment of Digital City. The metadata services architecture is described and explained in detail, including the related standards, technologies, and the practical experiences in the ‘Metadata Sharing Network Project of Digital Beijing' as well. Based on the web service, to build the metadata service architecture will be practically meaningful for organizing, managing and sharing the information resources in Digital City.