图 书 馆
使用与域无关的候选选择方法自动生成数据链接Automatically Generating Data Linkages Using a Domain-Independent Candidate Selection Approach |
|
| 课程网址: | http://videolectures.net/iswc2011_song_linkages/ |
| 主讲教师: | Dezhao Song |
| 开课单位: | 利哈伊大学 |
| 开课时间: | 2011-11-25 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | One challenge for Linked Data is scalably establishing high quality owl:sameAs links between instances (e.g., people, geographical locations, publications, etc.) in different data sources. Traditional approaches to this entity coreference problem do not scale because they exhaustively compare every pair of instances. In this paper, we propose a candidate selection algorithm for pruning the search space for entity coreference. We select candidate instance pairs by computing a character-level similarity on discriminating literal values that are chosen using domain-independent unsupervised learning.We index the instances on the chosen predicates’ literal values to efficiently look up similar instances. We evaluate our approach on two RDF and three structured datasets. We show that the traditional metrics don’t always accurately reflect the relative benefits of candidate selection, and propose additional metrics. We show that our algorithm frequently outperforms alternatives and is able to process 1 million instances in under one hour on a single Sun Workstation. Furthermore, on the RDF datasets, we show that the entire entity coreference process scales well by applying our technique. Surprisingly, this high recall, low precision filtering mechanism frequently leads to higher F-scores in the overall system. |
| 关 键 词: | 关联数据; 候选选择算法; 无监督学习 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-05-05：lxf |
| 阅读次数: | 47 |