图 书 馆
SPARQL的表达能力The Expressive Power of SPARQL |
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| 课程网址: | http://videolectures.net/iswc08_angles_epsparql/ |
| 主讲教师: | Renzo Angles |
| 开课单位: | 智利大学 |
| 开课时间: | 2008-11-24 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | This paper studies the expressive power of SPARQL. The main result is that SPARQL and non-recursive safe Datalog with negation have equivalent expressive power, and hence, by classical results, SPARQL is equivalent from an expressive point of view to Relational Algebra. We present explicit generic rules of the transformations in both directions. Among other findings of the paper are the proof that negation can be simulated in SPARQL, that non-safe filters are superfluous, and that current SPARQL W3C semantics can be simplified to a standard compositional one. |
| 关 键 词: | 安全数据记录; 通用规则; 非安全过滤器 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-09-21：heyf |
| 阅读次数: | 42 |