Measuring the structural similarity among XML documents and DTDs

Measuring the structural similarity between an XML document and a DTD has many relevant applications that range from document classification and approximate structural queries on XML documents to selective dissemination of XML documents and document protection. The problem is harder than measuring structural similarity among documents, because a DTD can be considered as a generator of documents. Thus, the problem is to evaluate the similarity between a document and a set of documents. An effective structural similarity measure should face different requirements that range from considering the presence and absence of required elements, as well as the structure and level of the missing and extra elements to vocabulary discrepancies due to the use of synonymous or syntactically similar tags. In the paper, starting from these requirements, we provide a definition of the measure and present an algorithm for matching a document against a DTD to obtain their structural similarity. Finally, experimental results to assess the effectiveness of the approach are presented.     

教学点播(EOD)的SOCP子空间模型与实现

总结了教学点播的概念,分析了目前教学点播研究中存在的问题。在对教学活动原型深入分析的基础上,提出了教学点播的SOCP子空间模型,概括了SOCP子空间模型的设计目标,详细介绍了SOCP子空间模型实现的总体架构和各个子空间的实现技术。最后叙述了在目前教学点播实现的基础上进一步的工作设想。     

XML-enabled workflow management for e-services across heterogeneous platforms

Advanced e-services require efficient, flexible, and easy-to-use workflow technology that integrates well with mainstream Internet technologies such as XML and Web servers. This paper discusses an XML-enabled architecture for distributed workflow management that is implemented in the latest version of our Mentor-lite prototype system. The key asset of this architecture is an XML mediator that handles the exchange of business and flow control data between workflow and business-object servers on the one hand and client activities on the other via XML messages over http. Our implementation of the mediator has made use of Oracle's XSQL servlet. The major benefit of the advocated architecture is that it provides seamless integration of client applications into e-service workflows with scalable efficiency and very little explicit coding, in contrast to an earlier, Java-based, version of our Mentor-lite prototype that required much more code and exhibited potential performance problems. Received: 30 October 2000 / Accepted: 19 December 2000 Published online: 27 April 2001     

XML技术在CBSE中的应用

随着面向对象方法的日趋成熟,构件的独立性,可重用性,在不同粒度上的可扩充性被人们所认识,基于构件的软件工程CBSE（Component-Based Software Engineering)将形成未来开发软件系统的基础。而另一方面,计算机网络发展迅速,各项技术日新月异,其中扩展标志语言XML（Extensible Markup Language）这项最新技术以其简单化,多用途形成了强大的生命力,本文详细论述了CBSE与XML的技术特性,并结合CBSE与XML这两方面技术的发展讨论了XML在CBSE中可发挥的强大作用与应用前景。     

基于三层网络架构及DOM的XML系统模型

本文阐述如何在三层网络架构上运用XML以构造XML文档支持系统,提出了基于三层网络架构及DOM的XML系统的模型,该系统与传统的客户／服务器应用或是应用一般的数据传输方式如HTML等系统相比具有减少了网络流量、更有利于检索、可从多种不同的数据源集成数据、开放性、可扩充性、可重用性等一系列特点。     

XML在Web Services中的应用与研究

针对传统的Web应用开发所面临的问题,通过对比与分析传统的Web开发方式和基于XML技术的Web应用开发方式,提出了一种新颖的基于XML技术的Web开发方式。该基于XML技术的Web开发方式与传统的Web开发方式相比,其具有的最大优点是:能够解决Web Services中业务系统抽象、统一多种业务受理流程、分隔显示逻辑与业务逻辑、构建灵活的数据交换、提供具有方便快捷的二次开发、提高Web应用开发的效率,从而以适应越来越复杂的Web应用系统的开发需求。     

基于XML的WEB报表设计

阐述了使用XSL的格式化控制和逻辑处理能力,及利用XML作数据载体进行WEB报表的设计思路和方法,同时结合开发实例加以剖析.     

XML技术与应用

XML已成为网络上对数据进行描述和传送的通用语言，其自描述性非常适用于不同应用间的数据交换．利用XML技术，可以实现对各种数据源如XML文档、native-XML数据库、XML-enabled数据库间的相互访问，完成信息交换，最后返回XML文档或根据具体需要返回相应数据格式．     

基于XML动态Web发布技术的实现

信息技术的发展使用户对Web服务的要求越来越多样化。而传统的动态Web发布技术难以满足这种变化，可扩展标记语言的出现无疑给这种变化带来新的发展契机。讨论了利用XML实现动态Web发布的基本原理，并通过实例说明了怎样利用XML中的文档对象模型和可扩展样式表单语言实现动态Web的发布。     

基于XML的网络课件页面结构设计与显示

提出了一种组织和存储基于XML的网络课件页面内容结构及显示格式的方法，举例介绍了如何充分利用HTML的特性将页面内容在Web浏览器中显示出来。