【作者】 谭娜；

【导师】 陈志国；

【作者基本信息】 河南大学 ， 基础数学， 2004， 硕士

【摘要】 随着信息化的发展和数据生产部门与应用部门的分离，数据共享成为信息基础设施建设的重要目标之一，其中元数据管理系统是实现数据共享的关键所在。地理空间数据内容繁杂且数据量庞大，建立空间信息元数据是对其进行管理及共享的有效、可行的方法。利用元数据对其数据进行描述、查询检索和管理可以满足数据生产者对数据的管理和维护，并能使用户实现快速查询。 XML全称是“可扩展标识语言”(Extensible Markup Language)，它是一种元语言，是用来描述其它语言的语言。论文重点介绍了与实现元数据管理系统有关的XML 1.0、XML Schema、XSLT和XQuery等相关的关键技术；深入研究了基于XML的元数据表达、转换和查询技术。 论文首先介绍了地理空间元数据的概念、元数据的作用和意义、元数据标准等内容。并以美国联邦地理数据委员会的元数据内容标准草案为标准，结合XML技术，设计了一个基于XML的网络空间信息元数据管理系统，系统主要实现了元数据注册、元数据浏览、元数据输入、元数据管理和元数据应用实例五大功能，为国家空间信息基础设施和数字地球的建设提供了一定的理论基础和技术原型，对地理空间信息的网络发布和共享具有积极的推动作用和深远的社会意义。 最后我们将所设计的空间信息元数据管理系统向FGDC申请注册，并且将该节点发布到Internet上，任何单位和个人都可以通过WWW浏览器访问我们的元数据。系统的研制成功表明，本文的研究路线可以促进数据生产者更有效地管理和维护数据，用户能够更快、更全面地发现、访问、获取和使用现势性强、精度高的数据，从而实现真正意义上的数据共享。更多还原

【Abstract】 With the development of information and separation between the production department and the application department, the data sharing has been one of the important purposes of the construction of information fundamental facilities .Among that, metadata management is the key to facilitate the sharing. Geo-spatial data is massive and complicated. It is a kind of effective and feasible method to set up the Geo-spatial metadata to manage and share them. With metadata, which is meaningful and easy-managed and interchanged, it can meet the data producer’s demands of searching what he wanted quickly and the desire to manage and maintain the data.XML stands for "Extensible Markup Language". It’s a metalanguage, which can describe other languages. This paper outlines the key techniques of XML 1.0, XML Schema, XSLT, XQuery, which are related to the realization of the metadata management system. Then deeply study the expression of metadata based on XML and the technology of transformation and search.This paper introduces the concept, role and meaning, and standard of metadata firstly. On the basis of the Content Standard of Metadata for Federal Geographical Data Committee and combined with the technology XML, this paper designs a Geo-spatial metadata management system. This system implements mainly five functions: the register, the browser, the input, the management of metadata and the application instance of metadata. This system provides the academic bases and technical prototype for constructing the National Spatial Information Infrastructure. At the same time, it will promote actively the sharing and network issue of geo-spatial information. It also has far-reaching social meaning.At last, we apply the register of the system designed by us to FGDC. Then we make this node open to the Internet users in order to let any unit and individual can access our metadata through WWW explorer. The success of this pilot system profits that the research and implementation introduced in this paper provides a feasible way for the data producer to manage and maintain data effectively, for the end user to find and access the data timely.更多还原