Analysis and Design of Metadata Standard Structure for Geosciences Data Sharing
Xie Chuan-jie · Geography and Geo-Information Science · 2005
Based on the analysis of requirement and technical bottleneck of geosciences data sharing, an uniform metadata architecture is designed and built up to ensure different discipline metadata standards working harmonically in the geosciences clearinghouse. The top-down hierarchy model is composed of core metadata, schema metadata and specification metadata. This system ensures many application profiles extended from the core metadata. The designed geosciences core metadata includes 8 sections, 15 compound elements and 55 basic elements, which are inherited from The National Scientific Data Sharing Core Metadata Standard Draft. According to the practical applications, geosciences metadata management system is designed. All the metadata groups are stored and managed in the XML database. They are organized by the relationship of the three-tier structure discussed above. Some of these technologies have been applied in the geosciences data clearinghouse (www.geodata.cn), which is one of the experiment units of National Science Data-Sharing Program in China.