网络科技资源平台中元数据的设计与实现

Design and implementation of resources' presentation platform based on metadata

网络科技资源具有地理分布广、异构、不规范、海量的特点,为了高效地查找和使用网络科技资源,提出了元数据技术来实现网络科技资源的统一组织和表示。使用基于正则表达式的元数据信息提取模型,有效地从数量巨大的Web页面中提取元数据信息。并基于轻量级目录访问协议LDAP(Lightweight Directory Access Protocol)的目录服务机制实现了科技资源元数据的存储和访问,测试表明其具有良好的可行性和有效性。

In order to search and utitize net based science and technology resources,which are broadly distributed,hybrid, irregular,massive,with high efficiency.the technology of metadata,which is utilized to organize and represent the resources in a unified way,is presented.Using metadata information extraction model based on regular expressions, metadata can be extracted from a huge number of Web pages.Directory service mechanism based on LDAP （Lightweight Directory Access Protocol） is used for science and technology metadata storage and accessing,and this method performs feasibly and effectively.