Visual Query Languages for Database Systems

多媒体、数字图书馆和电子出版等新技术需要大型数据库和强大的查询语言。 这个项目研究了一个数据库管理系统，它支持一个元查询语言，用户可以设计自己的可视化查询语言来指定要检索的数据和显示格式。 理论方面的研究解决的视觉查询，可以通过提供一个精心设计的查询评估引擎，保证时间复杂度进行评估类的表征。 实际目标包括实施一个支持可视查询的数据库管理系统，利用万维网传播结果，以及技术转让。 该项目具有很强的教育成分，寻求研究生和本科生的参与，并在课堂上纳入原型，以反映当今计算机科学更具互动性和视觉性的方面。 可视化查询语言将是下一代声明式数据库接口的关键组件，因为它们利用用户的视觉感知来有效地传达信息。它们的成功实施将为数据库系统提供目前尚不具备的基本能力。

New technologies such as multimedia, digital libraries, and electronic publishing require large databases and powerful query languages. This project investigates a database management system that supports a meta-query language with which users can design their own visual query languages to specify both the data to retrieve and the display format. Theoretical aspects of the research address the characterization of classes of visual queries that can be evaluated with guaranteed time-complexity by providing a careful design of the query evaluation engine. Practical goals include the implementation of a database management system supporting visual queries, the dissemination of results using the WWW, and the transfer of technology. The project has a strong educational component, seeking the involvement of graduate and undergraduate students and the inclusion of prototypes in the classroom so as to reflect the more interactive and visual aspects of today's computer science. Visual query languages will be key components of the next generation of declarative database interfaces because they take advantage of the user's visual perception to convey information efficiently. Their successful implementation will provide database systems with fundamental capabilities not currently available.