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