【作者】 李岩；

【导师】 王诚；

【作者基本信息】 清华大学 ， 计算机应用技术， 2004， 硕士

【摘要】 在跨平台、分布式以及异构的计算环境中,XML规范以其结构化、可扩展及灵活的特点提供了一种中立、标准的数据交换格式。随着工业界对XML技术的支持,XML以及由XML衍生出的系列技术构成了一套完整的采用XML技术进行数据传输的标准。XML及其相关技术的配合使用,在保留了XML可扩展和灵活的优势下,提供了对数据的查询、转换和对数据的安全保护能力。目前,XML规范被广泛的应用于商业数据交换以及电子政务等系统中,但是如何配合XML衍生技术和XML规范来进行数据的转换并保证数据的安全性的相关研究很少,因此本研究提出了一个XML-GOV架构,在电子政务系统中研究综合使用XML的定义、查询、转换和安全保障技术来进行数据的封装,转换,传输和表现来兼容异构系统间的数据获取,交换和表达。本研究中研究了电子政务系统中数据在其生命周期中如何应用XML及其衍生技术,以便提供数据在异构系统间的传输和交换能力。研究内容包括:(1)如何根据特定类型的应用文档来定义相应的XML模式,并根据此XML模式来验证应用文档的XML表现形式的有效性。(2) 讨论了如何在关系型数据库中存储XML数据。(3)以XSLT来进行XML数据间及XML数据和其它格式数据间的数据转换,实现XML与其它数据的相互转换。(4)应用XML的安全规范来提供XML文档在保存、交换、验证等方面的安全性,包括采用XML Encryption和XML Signature来实现XML 数据的加解密和数字签名。(5) 提出XML-GOV架构,在此架构中应用XML的数据转换和安全技术,以及如何将XML-GOV架构应用于电子政务系统。研究中采用XML-GOV架构实现了电子政务系统中的电子公文系统,作为应用XML-GOV架构的实例来展现如何应用XML及其衍生技术。通过该实例,来验证XML-GOV的可行性,并指出采用XML-GOV架构的优点。更多还原

【Abstract】 In multi-platform and distributed computing environments, XML supplies a kind of neutral and standard data interchange format on behalf of its structured, extensible and flexible data model. With the support of the industry vendors, XML and the series of technologies based on XML constructed a set of standards on exchanging data. XML and its derived technologies supplied the abilities of inquiry, transform and security of data except for extensibility and flexibility. Recently, XML has been applied in commercial data exchanging and e-government systems widely, but researches on how to combine XML derived technologies and XML in a same system are rare. The research invoked a architecture named XML-GOV, revealing how to apply XML and XML derived technologies to define, inquiry, transform and protect the XML data, and the architecture enables the data exchange among differed systems or different platforms. In the research, methods on how to apply XML and its derived technologies in order to enhance the data exchange ability among differed systems and differed platforms. The research includes: (1) How to define a XML schema according to some kind of documents in real, and how to validate the XML presentation of the real document according to the schema we produced. (2)The technique on storing XML data in relational databases. (3) Convert between XML format data and data in other formats based on XML transform technologies such as XSLT. (4) Accomplish the security requirements in storing, transferring and validations on XML data with XML derived technologies such as XML encryption and XML signature. (5) Invoke an architecture framework called XML-GOV, applying XML data transformation and security technologies. And further research on how to apply the framework in e-government systems. In the research work that has been done, an electronic document system was made base on the XML-GOV architecture, also it is an example showing how to use the XML-GOV framework. The advantages and feasibility of the framework are verified by the electronic document system.更多还原