The Research On The Application Of Metadata And XML Technology In Meteorological Information Dissemination System

With the rapid development of economy and the improvement of people's living standard, the status of information resources is increasing day to day. And the flow of information is more concerned, especially the meteorological information related closely to basic necessities of life has become an indispensable part of people's lives.At present, the application of meteorological information is empty of the illumination and support of metadata. Metadata is a data about data content, quality, condition and other characteristics. The basic function of metadata is to discribe the data. It helps users to understand the level and quality of data sources. It also can be used to judge the credibility and the scope of application data and provide a convenient means of data search. It is necessary for sharing meteorological information to establish metadata system.With the continuous development of Internet and technologies for both of hardware and software, distribution, maneuverability and isomerousity have become the main features of all kinds of information system. How to develop a completely extensible information system is attracting more and more attention from the researchers and developers. As a traditional language, HTML is a language of the text shows that the structure is not conducive to express complex meteorological data. Then because of the variety and structural complexity of meteorological data, it is necessary to develop uniform data standards to exchange the data between different platforms and different applications .As the next generation of internet language, XML retains the major advantage of extensible, structure and data confirmation of SGML, which flexibility allows to express a variety of information that is self-described. And XML is a language that platform independent, a cross-platform features, which provides the platform that exchange data between different data. The application of XML is even much broader.Thinking about the inherent characteristics of meteorological information, this paper raise a project to resolve the issues discussed above. The system described in this paper uses metadata and XML to implement the function of data sharing about meteorological information dissemination system. The author proposes the point that apply XML to meteorological information issue system for the first time.After researching the technology of metadata and XML,this paper analyses the establishment of meteorological metadata...