基于XML Schema 地球系统科学数据的元数据扩展机制.PDFVIP

第 34 卷 　第 3 期 测 　绘 　学 　报 Vol. 34 , No. 3 　2005 年 8 月 ACTA GEODAETICA et CARTO GRAPHICA SIN ICA Aug. ,2005 ( ) 　　文章编号 2005 中图分类号:P208 　　　　文献标识码 :A 基于 XML Schema 地球系统科学数据 的元数据扩展机制 1 2 1 1 崔丽美 ,谢传节 ,杨联安 ,张　蕾 ( 1. 西北大学 城市与资源学系 ,陕西 西安 710069 ; 2. 中国科学院 地理科学与资源研究所 资源与环境信 息系统国家重点实验室 ,北京 100101) Metadata Extension Mechanism of Earth System Science Data on Base of XML Schema 1 2 1 1 CU I Limei ,XIE Chuanjie , YAN G Lianan ,ZHAN G Lei ( 1. Depart ment of U rban and Resource Sciences , Northwest U niversity , Xi ’an 710069 , China ; 2 . S tate Key L abo ratory of Resources and Environmental Inf orm ation System , Institute of Geographical Sciences and N atural Re ) sources Research , Chinese Academy of Sciences , Beijin g 100101, China Abstract : This paper summarizes the application of metadata abroad and inland in geographical data sharing , and summarizes subject characteristics of Earth System Science data : huge data volume , complicated subject and too many metadata standards. So it is very necessary to establish a mechanism to extend metadata in developing and re searching DataSharing Network of Earth System Science. Basic methods , abstract model and basic principle of the mechanism to extend metadata ar