| Extracting Result Schema Based on Query Instances in the Deep Web |
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| 引用本文： | NIE Tiezheng YU Ge SHEN Derong KOU Yue LIU Wei. Extracting Result Schema Based on Query Instances in the Deep Web[J]. 武汉大学学报:自然科学英文版, 2007, 12(5): 835-839. DOI: 10.1007/s11859-007-0043-7 |
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| 作者姓名： | NIE Tiezheng YU Ge SHEN Derong KOU Yue LIU Wei |
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| 作者单位： | College of Information Science and Engineering, Northeastern University, Shenyang 110004, Liaoning, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （60673139, 60473073, 60573090） |
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| 摘 要： | Deep Web sources contain a large of high-quality and query-related structured date. One of the challenges in the Deep Web is extracting result schemas of Deep Web sources. To address this challenge, this paper describes a novel approach that extracts both result data and the result schema of a Web database. The approach first models the query interface of a Deep Web source and fills in it with a specifically query instance. Then the result pages of the Deep Web sources are formatted in the tree structure to retrieve subtrees that contain elements of the query instance, Next, result schema of the Deep Web source is extracted by matching the subtree＇ nodes with the query instance, in which, a two-phase schema extraction method is adopted for obtaining more accurate result schema. Finally, experiments on real Deep Web sources show the utility of our approach, which provides a high precision and recall.
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| 关 键 词： | 深层互联网 数据挖掘 地址 图片提取 |
| 文章编号： | 1007-1202（2007）05-0835-05 |
| 收稿时间： | 2007-02-27 |
| 修稿时间： | 2007-02-27 |
Extracting result schema based on query instances in the Deep Web |
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| Nie Tiezheng,Yu Ge,Shen Derong,Kou Yue,Liu Wei. Extracting result schema based on query instances in the Deep Web[J]. Wuhan University Journal of Natural Sciences, 2007, 12(5): 835-839. DOI: 10.1007/s11859-007-0043-7 |
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| Authors: | Nie Tiezheng Yu Ge Shen Derong Kou Yue Liu Wei |
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| Affiliation: | (1) College of Information Science and Engineering, Northeastern University, Shenyang, 110004, Liaoning, China |
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| Abstract: | Deep Web sources contain a large of high-quality and query-related structured date. One of the challenges in the Deep Web is extracting result schemas of Deep Web sources. To address this challenge, this paper describes a novel approach that extracts both result data and the result schema of a Web database. The approach first models the query interface of a Deep Web source and fills in it with a specifically query instance. Then the result pages of the Deep Web sources are formatted in the tree structure to retrieve subtrees that contain elements of the query instance. Next, result schema of the Deep Web source is extracted by matching the subtree’ nodes with the query instance, in which, a two-phase schema extraction method is adopted for obtaining more accurate result schema. Finally, experiments on real Deep Web sources show the utility of our approach, which provides a high precision and recall. Biography: NIE Tiezheng(1980–), male, Ph.D. candidate, research direction: Deep Web, schema matching. |
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| Keywords: | Deep Web schema extraction result schema query instance |
| 本文献已被 维普 SpringerLink 等数据库收录！ |
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