图 书 馆
从文档集合中构建聚焦分类Constructing a Focused Taxonomy from a Document Collection |
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| 课程网址: | http://videolectures.net/eswc2013_divoli_taxonomy/ |
| 主讲教师: | Anna Divoli; Harald Sack |
| 开课单位: | 德国波茨坦大学 |
| 开课时间: | 2013-07-08 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | We describe a new method for constructing custom taxonomies from document collections. It involves identifying relevant concepts and entities in text; linking them to knowledge sources like Wikipedia, DBpedia, Freebase, and any supplied taxonomies from related domains; disambiguating conflicting concept mappings; and selecting semantic relations that best group them hierarchically. An RDF model supports interoperability of these steps, and also provides a flexible way of including existing NLP tools and further knowledge sources. From 2000 news articles we construct a custom taxonomy with 10,000 concepts and 12,700 relations, similar in structure to manually created counterparts. Evaluation by 15 human judges shows the precision to be 89% and 90% for concepts and relations respectively; recall was 75% with respect to a manually generated taxonomy for the same domain. |
| 关 键 词: | 文档集合; 自定义分类; 语义关系; 自然语言处理工具 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-12-04：lxf |
| 阅读次数: | 57 |