Managing complex documents over the WWW: a case study for XML

The use of the World Wide Web as a communication medium for knowledge engineers and software designers is limited by the lack of tools for writing, sharing, and verifying documents written with design notations. For instance, the Z language has a rich set of mathematical characters, and requires graphic-rich boxes and schemas for structuring a specification document. It is difficult to integrate Z specifications and text on WWW pages written with HTML, and traditional tools are not suited for the task. On the other hand, a newly proposed standard for markup languages, namely XML, allows one to define any set of markup elements; hence, it is suitable for describing any kind of notation. Unfortunately, the proposed standard for rendering XML documents, namely XSL, provides for text-only (although sophisticated) rendering of XML documents, and thus it cannot be used for more complex notations. We present a Java-based tool for applying any notation to elements of XML documents. These XML documents can thus be shown on current-generation WWW browsers with Java capabilities. A complete package for displaying Z specifications has been implemented and integrated with standard text parts. Being a complete rendering engine, text parts and Z specifications can be freely intermixed, and all the standard features of XML (including HTML links and form elements) are available outside and inside Z specifications. Furthermore, the extensibility of our engine allows any additional notations to be supported and integrated with the ones we describe     

XML在冲模设计专家系统中的应用

分析了现有的网络标准在开发互联网应用中的局限性,介绍了丰在兴起的扩展标示语言XML,并将其引入冲模设计。设计了基于互联网的冲模设计专家系统构架,对XML的工程应用进行了有益的探讨。     

基于XML的数据交换与存取技术研究

可扩展置标语言XML(eXtensibleMarkupLanguage)是由W3C(WorldWideWebConsortium)组织于1998年2月制定的一种面向Internet应用的置标语言。作为对SGML(标准通用置标语言)的一种改良,XML具有良好的扩展性和自描述性、形式与内容分离、遵循严格的语法要求以及提供对多语种的支持等特点,使其成为Internet网上发布与数据交换的一门新兴技术,并有望在跨平台跨地域异构应用间的协同工作、基于语义的智能数据搜索等领域发挥重要作用。所有这些应用都又和XML的数据存取机制分不开的。基于上述种种原因,近年来,基于XML的数据交换与存取技术成为数据交换和存取领域的一项重要课题,并引起广泛关注。文章将此技术展开分析,详细探讨了XML数据存取机制,并结合关系型数据库和面向对象数据库,重点分析了XML在数据库中的存储模式和应用模式,最后对XML数据存取技术的发展趋势进行了展望。     

XML-based ISO9000 electronic document management system

Maintaining, customizing, sharing and reusing ISO9000 quality documents are essential for many organizations, especially those who work as virtual enterprises (VE). In a VE, the documents must be shared among organizations to take the full advantages of the recent Internet advances. XML is a new browser-based language standard. The purpose of this research is to explore the capabilities of XML and Internet technologies in electronic document management environments to comply with the ISO9000 requirements. This research has demonstrated several XML-enabled examples beneficial for the main functions of ISO9000 document management such as document creation, document change, document control and document access. The implemented examples demonstrate the effectiveness and efficiencies of document customizing, querying, hierarchical linking, tracking and reusing. The research results solve the ISO9000 document-related problems among working partners and facilitate document flow and information integration of value chain.     

基于子元素排列组合的XML文档信息隐藏

分析XML文档的层次结构,提出基于XML子元素排列组合的信息隐藏算法。将待隐藏秘密信息转换成十进制整数,利用子元素的排列组合形成等价元素,根据等价元素与整数间的映射关系,采用等价元素置换方法将整数嵌入XML文档。实验结果和分析表明,该算法不改变XML文件大小,其隐蔽性和鲁棒性优于现有XML文档信息隐藏技术,且信息隐藏量较大,可以应用于XML网页保护和隐秘通信。     

Compiler support for effective XSL transformation

XML is a markup language used to describe data or documents. The main goal of XML is to facilitate the sharing of data across diverse information systems, especially via the Internet. XML Stylesheet Transformations (XSLT) is a standard approach to describing how to transform an XML document into another data format. The ever‐increasing number of Web technologies being used in our everyday lives commonly employs XSLT to support data exchange among heterogeneous environments, and the associated increasing burdens on XSLT processors have increased the demand for high‐performance XSLT processors. In this paper, we present an XSLT compiler, named Zebu, which can transform an XSLT stylesheet into the corresponding C program. The compiled program can be used to transform documents without the processing of XSLT stylesheets. The results of experimental testing using standard benchmarks show that the proposed XSLT compiler performs well in processing XML transformations. Copyright © 2011 John Wiley & Sons, Ltd.     

XSLC:分层编码并面向查询的XML数据压缩算法

XML(extensible markup language)文档已经被广泛用作应用程序的一个数据交换格式,针对XML数据的压缩技术也逐渐成为新的研究领域。提出XSLC(XMLstream layered-coding compression)算法,通过预先扫描DTD对数据模式进行分析,继而根据元素的父子关系进行子元素层面的编码;同时根据数据类型进行数据压缩,能够在压缩之后的文档上进行查询,因为仅需一遍压缩扫描所以可以应用于数据流环境。实验表明:XSLC算法的压缩比率和压缩时间均优于传统算法。     

一种基于XML的企业知识管理框架

描述了基于互联网络上全新的通用描述性语言———可扩展的标识语言XML的企业知识管理框架。利用XML的优点来对企业中如何更为有效地进行知识管理进行了描述,并对知识管理当中的主要对象诸如知识对象、连接对象等进行了提取,描述了其相关的属性,构建了相应的文档类型声明DTD模板,从而开发了一个基于XML的知识管理框架。     

一种基于关键字的XML文档查询算法

对XML文档查询的常用方法有两种：一种是使用查询语言;另一种是使用关键字,而使用关键字查询XML文档比使用查询语言更为简单方便。给出了一种使用关键字查询XML文档的索引查找算法。该算法只需要扫描一次关键字对应的编码列,就可以找到需要的编码,提高了查询效率。实验表明该算法是可行的和有效的。     

XML Web服务技术探讨

以XML为基础的Web服务是下一代的WWW。它建立在W3C和IETF开放的标准之上，已逐渐成为业界公认的技术准则。介绍了Web服务的概念及其体系结构，讨论了构建Web服务的三大核心技术，即SOAP，WSDL和UDDI，并对其进行了详细的分析和探讨。     

基于XML的Web服务及关键技术

以XML为基础的Web服务是下一代的WWW。它建立在W3C和IETF开放的标准之上,已逐渐成为业界公认的技术准则。文章介绍了Web服务的概念及其体系结构,讨论了构建Web服务的三大核心技术,即SOAP、WSDL和UDDI,并对其进行了详细的分析和探讨。     

电子病历中基于XML的CDA应用

文章介绍了XML语言,它作为电子病历描述语言具有多项优点。它拥有大量的开发和应用工具,有利于对病历内容的处理。基于XML语言,医疗行业发布临床文档结构CDA,它提供了临床文件的交换模型,CDA为电子病历的实现提供了标准。文中通过实例说明基于XML的CDA的应用。     

SRML-一种基于XML的仿真模型描述语言

该文主要介绍了仿真参考标记语言SRML。SRML是一种基于XML的用于表示仿真模型的参考标记语言，它试图确定一个灵活的表示仿真模型的参考标准，以加快模型的开发速度，支持模型的重用。SRML声明了一组数量较少但相对完备的XML元素和元素属性如ItemClass、Item、EventClass、ItemEvent、EventSink、Simulation等来描述实体、实体间的关系、事件以支持仿真；它可最大限度地利用XML用户模式定义的元素来描述仿真实体。SRML仿真引擎可以采用不同的环境实现如Web浏览器、Java语言、C#等实现，从而支持仿真模型的互操作与集成、基于Web的仿真和协同仿真等。     

XML的即指即显与分页显示

可扩展标记语言或者简称XML ,是Web应用的一种新技术 ,它正以其自身的优势 ,逐渐成为网络世界的“国际语言”。应用XML组织数据 ,通过XSL和JavaScript获取数据分页显示到屏幕 ,同时实现用户的即指即显。     

一种基于s-DOM的XML文档索引算法

改造XML树模型是提高XML查询效率的重要方法。通过分析现有的索引算法,对XML树模型进行了改造,提出了基于Signature的索引策略(s-DOM)。采用该策略预处理XML文档可以大大缩小搜索范围,从而提高了查询的效率。     

V-DOM and P-XML—towards a valid programming of XML-based applications

Many WWW applications generate hypertext markup language or extensible markup language (XML) documents dynamically. Current tools, however, like languages using document object model (DOM) or JAVA Server Pages do not allow to check the validity of the generated documents statically. Instead, validity has to be ‘checked’ dynamically by appropriate test runs. This paper addresses this problem by introducing a new distinct class for each element type of a document type definition (DTD). Each class extends the Element-class of the DOM. The resulting object model is called validating DOM (V-DOM). Parametric XML (P-XML) is an extension of XML allowing to insert values of the newly defined classes in places, where the corresponding element types are allowed according to the underlying DTD. Like V-DOM, P-XML guarantees the validity of all XML documents generated by using P-XML. V-DOM and P-XML are illustrated by several examples.     

Building semantic trees from XML documents

The distributed nature of the Web, as a decentralized system exchanging information between heterogeneous sources, has underlined the need to manage interoperability, i.e., the ability to automatically interpret information in Web documents exchanged between different sources, necessary for efficient information management and search applications. In this context, XML was introduced as a data representation standard that simplifies the tasks of interoperation and integration among heterogeneous data sources, allowing to represent data in (semi-) structured documents consisting of hierarchically nested elements and atomic attributes. However, while XML was shown most effective in exchanging data, i.e., in syntactic interoperability, it has been proven limited when it comes to handling semantics, i.e.,  semantic interoperability, since it only specifies the syntactic and structural properties of the data without any further semantic meaning. As a result, XML semantic-aware processing has become a motivating challenge in Web data management, requiring dedicated semantic analysis and disambiguation methods to assign well-defined meaning to XML elements and attributes. In this context, most existing approaches: (i) ignore the problem of identifying ambiguous XML elements/nodes, (ii) only partially consider their structural relationships/context, (iii) use syntactic information in processing XML data regardless of the semantics involved, and (iv) are static in adopting fixed disambiguation constraints thus limiting user involvement. In this paper, we provide a new XML Semantic Disambiguation Framework titled XSDFdesigned to address each of the above limitations, taking as input: an XML document, and then producing as output a semantically augmented XML tree made of unambiguous semantic concepts extracted from a reference machine-readable semantic network. XSDF consists of four main modules for: (i) linguistic pre-processing of simple/compound XML node labels and values, (ii) selecting ambiguous XML nodes as targets for disambiguation, (iii) representing target nodes as special sphere neighborhood vectors including all XML structural relationships within a (user-chosen) range, and (iv) running context vectors through a hybrid disambiguation process, combining two approaches: concept-basedand context-based disambiguation, allowing the user to tune disambiguation parameters following her needs. Conducted experiments demonstrate the effectiveness and efficiency of our approach in comparison with alternative methods. We also discuss some practical applications of our method, ranging over semantic-aware query rewriting, semantic document clustering and classification, Mobile and Web services search and discovery, as well as blog analysis and event detection in social networks and tweets.     

XML schema language: taking XML to the next level

Schemas add data typing and inheritance features, giving XML the sophistication required to create enterprise-class business applications. The XML schema language describes the legal structure, content, and constraints of XML documents. The XML schema language provides the necessary framework for creating XML documents by specifying the valid structure, constraints, and data types for the various elements and attributes of an XML document. Schema language provides enhanced as well as more comprehensive and powerful features than a document type definition (DTD). The XML schema language provides the rich data typing associated with ordinary programming languages. The W3C XML schema specification defines several different built-in data types, such as string, integer, Boolean, date, and time, among others. The specification also provides the capability for defining new types. Developers can use these built-in as well as user-defined data types to effectively define and constrain XML document attributes and element values