图 书 馆
面向数据的内容查询系统：将网页上的搜索数据转化为文本Data-oriented Content Query System: Searching for Data into Text on the Web |
|
| 课程网址: | http://videolectures.net/wsdm2010_zhou_docq/ |
| 主讲教师: | Mianwei Zhou |
| 开课单位: | 伊利诺伊大学 |
| 开课时间: | 2010-03-18 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | As the Web provides rich data embedded in the immense contents inside pages, we witness many ad-hoc efforts for exploiting fine granularity information across Web text, such as Web information extraction, typed-entity search, and question answering. To unify and generalize these efforts, this paper proposes a general search system - Data-oriented Content Query System (DoCQS) - to search directly into document contents for finding relevant values of desired data types. Motivated by the current limitations, we start by distilling the essential capabilities needed by such content querying. The capabilities call for a conceptually relational model, upon which we design a powerful Content Query Language (CQL). For efficient processing, we design novel index structures and query processing algorithms. We evaluate our proposal over two concrete domains of realistic Web corpora, demonstrating that our query language is rather flexible and expressive, and our query processing is efficient with reasonable index overhead. |
| 关 键 词: | 内容查询系统; 通用搜索系统; 索引结构 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-07-14：yumf |
| 阅读次数: | 46 |