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首页> 外文期刊>ACM Transactions on Internet Technology >Graphical Query Interfaces for Semistructured Data: The QURSED System
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Graphical Query Interfaces for Semistructured Data: The QURSED System

机译：半结构化数据的图形查询界面：QURSED系统

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摘要

We describe the QURSED system for the declarative specification and automatic generation of Web-based query forms and reports (QFRs) for semistructured XML data. In QURSED, a QFR is formally described by its query set specification (QSS) which captures the complex query and reporting capabilities of the QFR and the associations of the query set specification with visual elements that implement these capabilities on a Web page. The design-time component of QURSED, called QURSED Editor, semi-automates the development of the query set specification and its association with visual elements by translating intuitive visual actions taken by a developer into appropriate specification fragments. The run-time component of QURSED produces XQuery statements by synthesizing fragments from the query set specification that have been activated during the interaction of the end-user with the QFR and renders the query results in interactive reports as specified by the QSS. We describe the techniques and algorithms employed by QURSED with emphasis on how it accommodates the intricacies introduced by the semistructured nature of the underlying data. We present the formal model of the query set specification, as well as its generation via the QURSED Editor, and focus on the techniques and heuristics the Editor employs for translating visual designer input into meaningful specifications. We also present the algorithms QURSED employs for query generation and report generation. An online demonstration of the system is available at http://www.db.ucsd.edu/qursed/.
机译：我们描述了用于声明性规范的QURSED系统，并为半结构化XML数据自动生成基于Web的查询表单和报告（QFR）。在QURSED中，QFR由其查询集规范（QSS）正式描述，该集捕获QFR的复杂查询和报告功能以及查询集规范与在网页上实现这些功能的可视元素的关联。 QURSED的设计时组件称为QURSED编辑器，它通过将开发人员采取的直观视觉动作转化为适当的规范片段，来半自动化查询集规范的开发及其与视觉元素的关联。 QURSED的运行时组件通过综合来自查询集规范的，在最终用户与QFR交互期间已激活的片段来生成XQuery语句，并将查询结果呈现在QSS指定的交互式报表中。我们将描述QURSED所采用的技术和算法，重点在于它如何适应基础数据的半结构化性质所引入的复杂性。我们介绍了查询集规范的形式化模型，以及通过QURSED编辑器生成的查询模型，并着重介绍了该编辑器用于将可视化设计师输入转换为有意义的规范的技术和启发式方法。我们还将介绍QURSED用于查询生成和报告生成的算法。该系统的在线演示可从http://www.db.ucsd.edu/qursed/获得。

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