基于XML的数据交换与存取技术研究

Study of Data Exchange and Access Based on XML

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 (eXtensible Markup Language),a new Internet-oriented markup language,was put forward by W3C(World Wide Web Consortium)in February1998.As an improvement to SGML (Standard Generalized Markup Lan-guage),XML brings some characters with itself,such as good extensibility and self-description,separation of content from presentation,conforming to rigid grammar definition and supporting multi-encoding character,which make it a novel technology in the fields of Web publish and data exchange on the Internet.Due to these advantages,XML-based data exchange and data access has become an important subject in relative fields in recent years.According to the technolo-gy,the theory and method of data access based on XML are studied in detail in this paper.Emphasized on the RDBMS (Relational Database Management System)and the OODBMS (Object-Oriented Database Management System),the model of access and application in database are analyzed.In addition,the tendency of data access technology based on XML is also predicted in the paper.