Translating relational schema into XML schema definition with data semantic preservation and XSD graph

Many legacy systems have been created by using relational database operating not for the Internet expression. Since the relational database is not an efficient way for data explosion, electronic transfer of data, and electronic business on the Web, we introduce a methodology in which a relational schema will be translated to an Extensible Markup Language (XML) schema definition for creating an XML database that is a simple and efficient format on the Web. We apply the Indirect Schema Translation Method that is a semantic-based methodology in this project. The mechanism is that the Relational Schema will be translated into the conceptual model, an Extended Entity Relationship (EER) Model using Reverse Engineering. Afterward, the EER model will be mapped to an XML Schema Definition Language (XSD) Graph as an XML conceptual schema using Semantic Transformation. Finally, the XSD Graph will be mapped into the XSD as an XML logical schema in the process of Forward Engineering, and the data semantics of participation, cardinality, generalization, aggregation, categorization, N-ary and U-ary relationship are preserved in the translated XML schema definition.     

Breathing life into legacy

The Internet makes it imperative to unlock legacy data. Three technologies may let companies dust off legacy code and make it work with the Web: Extensible Markup Language, or XML, describes data through the use of tags, eliminating the need to conform to a specific programming infrastructure; Web services let companies wrap software and tailor its distribution, allowing innovative code configurations; and wireless technology offers the ability to get legacy content to mobile workers and clients. Each technology is part of the new arsenal for leveraging existing applications and data, perhaps realizing the elusive goal of anywhere, anytime services     

XML's impact an databases and data sharing

The Extensible Markup Language, HTML's likely successor for capturing much Web content, is receiving a great deal of attention from the computing and Internet communities. Although the hype raises unrealistic expectations, XML does reduce the obstacles to sharing data among diverse applications and databases by providing a common format for expressing data structure and content. Although some benefits are already within reach, others will require new database technologies and vocabularies for affected application communities     

Leveraging legacy system dollars for e-business

Although many firms have rapidly and enthusiastically adopted distributed architectures, many more are stuck with mainframe based mission-critical systems that continue to isolate them from their partner, supplier, and customer systems. Most companies want to transform their applications to meet new business demands, but because legacy systems tend to be unwieldy, monolithic, and inflexible, many firms regard modernization as somewhere between improbable and impossible. Reeling from the Y2K debacle and saddled with years of application backlog, the most these companies can hope for is to keep their legacy system alive. And keeping it alive is getting more expensive. It is also becoming harder to find qualified personnel to do the maintenance. All of this makes it difficult to add new functionality and keep up with business requirements. The ideal solution is to transform legacy systems to newer, more productive platforms so that companies can exploit faster and cheaper development technologies, like Java and XML (Extensible Markup Language). The focus then shifts to functionality, not the infrastructure, which means a company can respond more quickly to its changing business requirements and technology enhancements. RescueWare, legacy transformation software from Relativity Technologies, breaks business knowledge into stand-alone pieces, or e-components. The e-components are basically collections of objects that perform specific business services, have clearly defined application program interfaces (APIs), and are accessible through modern industry-standard protocols     

基于语义约束的数据转换模式研究

XML是因特网中不同企业之间进行信息交流的一种标准的数据转换模式,为了加速数据之间的转换,企业组织通过定义公共数据文档接口来实现基于XML的应用。本文提出了一种新的将关系数据模式转换为XML模式的方法。在转换的过程中,不仅考虑关系模式的结构,而且考虑语义约束,比如内部函数依赖。该方法的输入模式是具有多值函数依赖的关系模式,输出模式是X-Schema。最后,通过实验对该转换方法进行了验证。     

XML文本数据自动分析研究

XML是目前已被广泛采用的WWW上信息交换和表示的技术之一,被称为未来的数据通用格式,本文对现有的XML语法进行研究,用新的文本方式表示XML数据,针对可扩展XML数据的一些特殊形式提出了一些新的概念模式并证明了有效性和正确性,同时对语法可简化性进行了证明。针对相应的特殊Ⅻ几语法形式开发了相应的自动机分析算法并进行分析。     

The impact and implementation of XML on business-to-business commerce

This paper discusses the impact analysis of the Extensible Markup Language (XML). Each business partner within a supply chain will be allowed to generate its own data exchange format by adopting an XML meta-data management system in the local side. Followed after a brief introduction of the information technology for Business to Customer (B2C) and Business to Business (B2B) Electronic Commerce (EC), the impact of XML on the tomorrow business world is discussed. A real case study for impact analysis on information exchange platform, Microsoft's BizTalk platform which is actually an XML schema builder and the implementation of XML commerce application will provide an interest insight for users' future implementation.     

XML strategies for legacy database search

Over the past few years, XML (Extensible Markup Language) has become the standard for data and document interchange between distributed systems. With the continuing proliferation of the Internet, XML has also become a key technology for transactional e-business. A large percentage of Internet interactions, however, involves searching through documents, Web pages, databases, and other information resources. This article explores some of the ways XML can improve these types of searches. It focuses particularly on searches through legacy databases and on the changes you can make to your legacy systems to effectively exploit XML.     

可扩展标记语言XML的产生与应用技术

可扩展标记语言 ＸＭＬ是一项新兴的网络技术,它由 Ｗ３Ｃ制订并于 １９９８年正式发布。 ＸＭＬ的产生源于 ＨＴＭＬ和ＳＧＭＬ,文章对这一背景给予了简要的讨论,并从可扩展性、结构描述和有效性确认三个主要方面介绍了ＸＭＬ的优点．文章重点讨论了基于 ＸＭＬ的网络应用,给出了一个通用的应用模式,详细探讨了其中的若干关键技术问题。     

XML的研究现状及展望

首先介绍了XML的结构、表现、特点及其建立应用的步骤,并列举了 XML的几种主要分支,然后简述了XML与其它现有相关技术的结合,给出了目前XML的主要应用领域,最后对XML的前景进行了展望。     

Data storage and extraction in engineering software using XML

Most engineering analysis programs rely on customized procedures for storing and accessing scientific data. The size of the data set needed to characterize an engineering problem can be substantial, particularly as the problem increases in complexity. This paper presents a methodology for greatly improving the accessibility of scientific data using the Extensible Markup Language (XML) to define a consistent procedure for data storage and retrieval. When the data is expressed in an XML format, any portion of the data set can be easily accessed by interfacing with an XML parser. Examples are provided for automating design calculations and CAD drawings.     

Single-source publishing with XML

Companies can offer levels of customization along with the ability to retarget or repurpose materials in ways that were impractical or even impossible just five years ago. The net result is that companies with information stores can now create new sources of revenue while managing their existing data more efficiently. The key technology that makes this possible, Extensible Markup Language (XML), has received tremendous publicity over the past couple of years. The difference now, however, is that software vendors have integrated XML into their products, giving companies a chance to test concepts and design systems-level strategies that take advantage of XML. The industry is deploying the first wave of applications that use XML and related technologies. The paper summarizes some characteristics of these tools. Single source publishing can help organizations reuse content easily and quickly.     

A method for the unification of XML schemata

Extensible Markup Language (XML) is a common standard for data representation and exchange over the Web. Considering the increasing need for managing data on the Web, integration techniques are required to access heterogeneous XML sources. In this paper, we describe a unification method for heterogeneous XML schemata. The input to the unification method is a set of object-oriented-based canonical schemata that conceptually abstract local Document Type Definitions of the involved sources. The unification process applies specific algorithms and rules to the concepts of the canonical schemata to generate a preliminary ontology. Further adjustments on this preliminary ontology generate a reference ontology that acts as a front-end for user queries to the XML sources.     

基于XML的Web客户端数据粒状更新与分布式计算

本文以实例介绍了XML在粒状更新Web客户端数据和实现简单的分布工计算方面的应用，并介绍了DOM对象和XML数据岛技术及其应用。     

Canonical Forms of XML Schemas

This paper studies certain transformations of XML schemas, which are widely used in algorithms of the XML data management. In view of the fact that properties and functional characteristics of the XML documents considerably differ from those of data of other type, the solutions of a number of typical data management problems (such as the XML data validation, schema inference, and data translation to/from other models) for them are more complicated. The general idea of our approach to solving these problems is to transform the original structure (i.e., structural schema constraints) into another structure without loss of information about properties of the original data that are important for applications. The suggested technique has been successfully used in various algorithms for solving problems of this kind. In this paper, a systematic approach to solving these problems is discussed. Methods for reducing the XML schemas to several canonical forms are presented, and algorithms of solving the management problems for data satisfying schemas represented in the canonical forms are examined.     

基于XML的工作流体系结构的研究

可扩展标记语言及其相关技术同工作流管理系统的实现方式日益紧密地结合在一起，而对XML工作流体系结构的研究将成为这一领域的热门课题。针对这样的现状，本文提出了一种基于XML的工作流体系结构，并分别从过程定义、过程实例化、分布式数据传输、XML数据保存和客户界面开发等五个方面探讨了该体系结构所涉及的技术问题。     

XML序列化机制在客户关系管理中的应用

随着分布式应用程序的发展,需要在多个应用程序之间进行对象传输.XML(Extensible Markup Language)是一种公共的交互平台,用于在各种不同的系统之间进行数据交换,这使得XML在分布式应用程序的数据交换时显现很大的优势.CRM(Customer Relationship Management)是一个...     

基于XML Schema的异构数据源集成技术研究

异构数据源集成过程中所面对的首要问题是异构问题,包括系统异构、模式异构和语义异构三个。以W3C的XML Schema标准作为异构数据源的全局模式,借助XML Schema强的数据描述能力,通过实现关系模式的提取、关系模式到XML Schema的转化和附加语义约束,实现了异构数据源的集成。     

基于XML的SIPN表示与解析研究

基于XML设计了一种Petri网（SIPN）的交换格式。XML是具有数据描述功能、高度结构性及可验证性的语言,首先设计了SIPN的Schema文件,并根据该Schema文件将SIPN图形转化成XML格式文件,该文件包含了SIPN的图形和语义信息。利用DOM对该XML格式的SIPN模型进行解析,可以提取模型的关键信息,为应用程序提供一个接口,这可以推动基于Petri网的应用程序开发,实例证明该方法具有很好的实用性和可扩展性,可以用于其它扩展Petri网格式的设计。