| 摘要: |
| 该文提出了分布式WWW(world-wide web)数据源WWWDS(WWW data sources)概念,详细介绍了WWWDS的数据模型.该数据模型包括节点、节点容器、节点图和链接点等,简单且具有扩展性,同时提出相应的查询能力强的查询语言WWWQL(WWW query language),并进一步探讨了查询处理和优化问题. |
| 关键词: WWW,分布数据源,数据模型,查询处理和优化,查询质量. |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家自然科学基金资助. |
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| Towards Globalization of Distributed Data Sources over WWW——Data Model and Query Language |
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CHEN Ying,XU Hong-bing,WANG Neng-bin
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| Abstract: |
| In this paper, the concept of global distributed data sources over WWW(WWWDS) is introduced. A simple and extensible data model based on node, node container, node graph and link points are discussed in details. A powerful SQL-like query language (WWWQL) for WWWDS is introduced and the query processing and optimization technology for WWWQL are discussed as well. |
| Key words: World-Wide web, distributed data sources, data model, query processing and optimization, quality of query. |
