Typical information retrieval systems 典型的信息检索系统
- Online library catalogues 在线图书馆目录
- Online document management systems 在线文档管理系统
- News and legal databases 新闻法律数据库
- Recommender systems (that push rather than pull information) 推荐系统
- While IR has a long history, the innovation of Web search engines has driven development in the past 25 years. 虽然信息检索历史悠久,但在过去的25年里,网络搜索引擎的创新推动了发展。 - Information retrieval (IR) versus database (DB) systems 信息检索与数据库系统
- Some DB problems are not present in IR, such as: updates, transaction management, complex structured objects 某些数据库问题在信息检索中不存在,例如:更新、事务管理、复杂的结构化对象 
- Some IR problems are not addressed well in DBMS, for example:  使用关键词和相关性进行近似搜索- unstructured documents 非结构化文档
- approximate search using keywords and relevance 使用关键词和相关性进行近似搜索
 
 
                         
                                

