Adaptive XML to relational mapping: an integrated approach

来源 :Journal of Zhejiang University(Science A:An International Ap | 被引量 : 6次 | 上传用户:zjs999
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Storing and querying XML (eXtensible Markup Language) data in relational form can exploit various services offered by modern relational database management systems (RDBMSs). Due to structural complexity of XML, there are many equivalent relational mapp
其他文献
有时,一些游艇爱好者往往将注意力集中到他们最终的目的地上,便顾不得一些小的港口了,从而模糊了潜在的海岸和前进的方向。对于布列塔尼海岸,甚至更重要的航向,往往都要依靠闪光信号灯才能注意到。
期刊
Soil types, humus types and vegetation as well as their hypsometric variation were analysed in terms of sequences in the northern part of the high mountains of the Pirin National Park at altitudes bet
期刊
黑龙江省地理信息产业园是2003年7月8日由黑龙江省人民政府批准成立的全国首家以地理信息产业为运营主体的专业高科技园区。园区位于哈大齐工业走廊起始处,占地面积27万平方米,预计总投资3.8亿元人民币,产业区及附属设施建筑面积23万平方米,重点开展四个基地建设:地理信息技术创新基地、信息企业孵化基地、服务外包产业示范区及信息
期刊
The purpose of this study was to assess the extent of cadmium (Cd) contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from Chenzhou City, Southern China
期刊
Structure-activity relationship (SAR) and quantitative structure-activity relationship (QSAR), collec- tively referred to as (Q)SARs, play an important role in ecological risk assessment (ERA) of orga
期刊
Pedogenetic soil horizons are one of the fundamental building blocks of modern soil classification;however,in soils of urban areas which are often strongly disturbed by human activities,horizons are d
期刊
Quantification of complicated surface morphology of soil crack is a prerequisite and key to soil crack study. This paper takes soil crack quads in Yuanmou arid-hot valley region as examples, selecting
期刊
从社区生态系统内外环境、社会文化、经济、物质技术等各方面,访谈和问卷调查相结合,建立一套居住型生态社区评价指标体系,并应用到本溪南芬区细河社区,对社区客观环境建设水平和居民满意度进行评价。结果显示客观环境评价社区可持续综合指数为 0.4355,处于Ⅲ级水平,可持续发展能力一般;居民满意度评价中社区可持续综合指数为0.4255,处于Ⅲ级水平,说明该社区的可持续发展能力中等,须作相应改善;无论是各子系
期刊
提出了一个用于复杂装备维修训练的桌面虚拟系统,可以练习某些特定组件的维修拆卸。利用动态链接库实现了系统模块化的软件体系结构,保证了数据的封装和模块化。通过用户化过程设置了用于拆卸顺序规划和VR环境3D模型的数据库,在友好的用户界面的引导之下,用户通过在虚拟环境中的漫游和实时更新的维修信息的帮助下了解全部维修过程。系统能够在生成合理的拆卸顺序和确定配件方面提供智能辅助,而且原型系统提供了针对CAD模
期刊
Our study deals with two major issues impacting current WebGIS development: interoperability of heterogeneous data and visualization of vector data on the Web. By using the combination of Geography Ma
期刊