XML在数据交换中的应用

HTML作为一种简单易用地标记语言,极大地推动了Internet的发展。但是随着Internet应用的展开,HTML已经不能满足人们的需要。XML作为下一代Internet语言,具有极大的灵活性。利用XML可以在Internet展开各种复杂的应用。基于XML数据交换系统的原型,用XML作为数据中介,实现了异构数据的集成和交换。     

XML and Web Services Security Standards

XML and Web services are widely used in current distributed systems. The security of the XML based communication, and the Web services themselves, is of great importance to the overall security of these systems. Furthermore, in order to facilitate interoperability, the security mechanisms should preferably be based on established standards. In this paper we provide a tutorial on current security standards for XML and Web services. The discussed standards include XML Signature, XML Encryption, the XML Key Management Specification (XKMS), WS-Security, WS-Trust, WS-SecureConversation, Web Services Policy, WS-SecurityPolicy, the eXtensible Access Control Markup Language (XACML), and the Security Assertion Markup Language (SAML).     

基于DOM的XML解析技术在构件描述中的应用

在Visual C#中,解析器可将代码中的扩展标记语言(eXtensible Markup Language,XML)注释处理为外部XML文档。文档对象模型(Document Object Model,DOM)定义了一个独立于平台和语言的标准接口,应用程序通过它访问和修改XML文档数据。介绍了DOM的特点和功能,并在ASP.NET平台下通过封装的DOM类库解析和存取XML文档,完成了对XML文档数据提取,将解析出的数据导入数据库作为构件描述信息的应用实例。     

浅析数据库与XML的结合

XML逐渐成为互联网上数据描述和交换的标准，它将成为Web上存放数据的主要格式。本文分析了XML与数据库的关系，并阐述了XML在SQL Server中的支持现状。     

XML电子政务数据交换平台的研究与设计

介绍了可扩展标记语言（XML）的特点以及电子政务数据交换平台的体系结构，提出了基于XML的数据交换体系结构典型设计，应用效果表明，该设计消除了信息孤岛，实现了系统与各部门或园区各企业之间的信息共享和互通。     

基于本体论的电子商务知识描述语言

应用本体论对电子商务知识建模,提出电子商务知识描述的分层框架,并结合描述逻辑、框架系统设计面向电子商务的知识描述语言(KDL).介绍了KDL的语法,从一阶逻辑的角度分析KDL的语义特征,提供KDL描述到一阶逻辑表达式的映射方法.最后,通过实例证明KDL具有规范的语法、精确的语义和较强的逻辑推理能力.     

基于MDA的UML类模型转换XML Schema的方法

本文给出了统一建模语言(UML)类模型和XML Schema的转换方法,为模型驱动体系结构(MDA)的实现提供了基础.UML被MDA用来描述各种模型,成为建模语言事实上的标准;XML 以其结构性、标签性、可扩展性和可移植性成为数据交换方面的标准技术,广泛地应用于计算机软件.对用于实现MDA的UML类模型和XSD的转换进行了研究:分析了UML类图的关联、继承、组合和聚合关系,实现UML类模型和XML Schema的转换,最终生成XML文档.     

An Image/Video Self-Description Scheme for MPEG-7

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Query by templates: using the shape of information to search next-generation databases

We present a user-centered database query language called QBT (Query By Templates) for user communication with databases containing complex structured data, such as data stored in the Extensible Markup Language (XML). XML has revolutionized data storage as well as representation and transfer methods in today's internet applications. The growing popularity of XML as a language for the representation of data has enabled its use for several applications involving storage, interchange, and retrieval of data. Several textual query languages have been proposed for XML retrieval, including the World Wide Web Consortium's (W3C) recommendation of XQuery. Native XML database systems have been implemented, all of which provide methods for user communication with the database, although most communication methods use text-based query languages or form-based interfaces. QBT, the language presented here, is one of the first attempts toward a generalized alternative language that is based on human factors of familiarity. It is ideal for documents with a simple yet highly recognizable layout (e.g., poems, dictionaries, journals, etc.). We present the QBT language and report results from an initial usability test that shows promise for this type of an interface as a generalized user-database communication method.     

基于XML技术的武器控制系统交联信息解析

将可扩展标记语言(XML)技术应用到武器控制系统交联信息解析中.首先,根据采集的交联信息格式和逻辑关系,建立XML文件,采用位运算方法,从导弹发射控制逻辑层面解析交联信息码,解决了多种弹型多种工作状态下信息检索的难题;其次,通过分析比较两种典型的XML文档解析技术,选择基于DOM的解析技术,并给出XML解析过程;最后,...     

基于XML的复杂装备ATS测试仪器的建模

针对自动测试系统(Automatic Test System,ATS)中信息共享和测试仪器互操作能力差的问题,应用XML(eXlensible Markup Language)语言描述复杂装备ATS的测试仪器,实现测试仪器的跨平台交换与数据共享。采用XML Schema的UML建模方法,对测试仪器进行了建模分析,实现了测试仪器描述层的互操作性,提高了ATS测试仪器建模的开发效率。     

基于CoSMIC的CCM构件描述

构件描述是CCM（CORBAComponent Model）开发中的一个重要步骤,它是构件部署的基础。本文以雷达A/R显示构件为例详细讲述了在CoSMIC（Component Synthesis with ModelIntegrated Computing）下使用PICML（Platform-Indepndent Component Modeling Language）语言进行构件描述的方法。与直接使用XML（eXtensible Markup Language）语言描述相比,该方法直观简单,层次清晰,提高了开发效率。     

A New Model for Secure Dissemination of XML Content

The paper proposes an approach to content dissemination that exploits the structural properties of an Extensible Markup Language (XML) document object model in order to provide an efficient dissemination and at the same time assuring content integrity and confidentiality. Our approach is based on the notion of encrypted postorder numbers that support the integrity and confidentiality requirements of XML content as well as facilitate efficient identification, extraction, and distribution of selected content portions. By using such notion, we develop a structure-based routing scheme that prevents information leaks in the XML data dissemination, and assures that content is delivered to users according to the access control policies, that is, policies specifying which users can receive which portions of the contents. Our proposed dissemination approach further enhances such structure-based, policy-based routing by combining it with multicast in order to achieve high efficiency in terms of bandwidth usage and speed of data delivery, thereby enhancing scalability. Our dissemination approach thus represents an efficient and secure mechanism for use in applications such as publish-subscribe systems for XML Documents. The publish-subscribe model restricts the consumer and document source information to the routers to which they register with. Our framework facilitates dissemination of contents with varying degrees of confidentiality and integrity requirements in a mix of trusted and untrusted networks, which is prevalent in current settings across enterprise networks and the Web. Also, it does not require the routers to be aware of any security policy in the sense that the routers do not need to implement any policy related to access control.     

航天测控设备状态配置和管理方法

针对我国航天测控网设备状态配置和管理方法现状,分析了测控设备任务准备和历史任务恢复节点的现实需要,提出了航天测控设备历史状态宏迁移、设备参数共享以及设备状态集中管理3种方法。通过分析比较,给出了设备状态集中管理和可扩展标记语言( XML)格式设备状态共享方法相结合的实现途径。该方法能够实现设备参数的快速设置和检查以及不同设备之间状态的共享,有利于提高整个测控网的自动化程度和运行效率。     

XML文件解析技术在边界扫描测试中的应用

分析了文档对象模型（DOM）的特点、工作原理及DOM解析XML文档的方法和主要接口,并将其应用到雷达插件边界扫描检测系统中。在智能分析冗余错误信息的基础上,得出精简、准确的解析报告,基于数据库信息提取实现了故障点可视化定位和故障原因分析,最终集成到综合电路自动化测试系统中,解决了第三方软件在一体化自动测试软件中的集成和二次开发问题。     

Transporting data between wireless applications using a messaging system—MMS

There is a demand for using messaging systems to transport data between wireless applications in mobile communications. As multimedia messaging service (MMS) is a promising messaging system to meet the demand, it is under enhancement in related standardization bodies to make it effective in transporting application data. The enhancement should be compatible with the existing MMS services for its smooth and safe deployment. This paper proposes a solution to make the enhancement backward compatible, so that a new MMS service of transporting application data has no impact on the existing MMS services. The solution also provides forward compatibility, so that an MMS service of transporting application data does not hinder the introduction of any application in the future, allowing instantaneous deployment of a wireless application. The standardization bodies did not define any format for data communication between a wireless application and MMS in a terminal. A common format in this regard would help mass availability of wireless applications for different purposes independent of manufacturing a mobile terminal. Based on an analysis described in this paper, eXtensible Markup Language (XML) is the suitable format for the purpose. This paper also presents examples of XML file to indicate what data should be communicated in this regard. Copyright © 2006 John Wiley & Sons, Ltd.