A relationally complete visual query language for heterogeneous data sources and pervasive querying

S. Polyviou, G. Samaras, P. Evripidou
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引用次数: 23

Abstract

In this paper we introduce and formally define Query by Browsing (QBB), a scalable, relationally complete visual query language based on the desktop user interface paradigm and tuple relational calculus that allows the formulation of complex queries over relational, entity-relationship, object-oriented and XML data sources on a variety of handheld and desktop platforms. It is to our knowledge the first visual query language to combine the important characteristics of usability, scalability, expressive power and flexibility. We support these claims by demonstrating the similarity of the QBB paradigm to the popular desktop user interface paradigm, by relating it to relational calculus and relational algebra and by describing Chiromancer II, a Web-based implementation of the QBB paradigm for handheld devices. We also discuss ways in which non-relational sources can be represented and queried and compare QBB to related work in the area of visual query languages for a variety of data models. We finally offer conclusions and thoughts for future work.
一种相对完整的可视化查询语言,用于异构数据源和普适查询
在本文中,我们介绍并正式定义了Query by Browsing (QBB),这是一种基于桌面用户界面范式和元组关系演算的可扩展的、关系完整的可视化查询语言,允许在各种手持和桌面平台上对关系、实体关系、面向对象和XML数据源进行复杂查询。据我们所知,它是第一个结合了可用性、可扩展性、表达能力和灵活性等重要特征的可视化查询语言。我们通过展示QBB范式与流行的桌面用户界面范式的相似性、将其与关系微积分和关系代数联系起来以及描述Chiromancer II(用于手持设备的基于web的QBB范式实现)来支持这些主张。我们还讨论了表示和查询非关系源的方法,并将QBB与针对各种数据模型的可视化查询语言领域的相关工作进行了比较。最后对今后的工作提出了结论和思考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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