Automatically maintaining wrappers for semi-structured web sources

被引：18

作者：

Raposo, Juan

Pan, Alberto

Alvarez, Manuel

Hidalgo, Justo

机构：

[1] Univ A Coruna, Dept Informat & Commun Technol, La Coruna 15071, Spain

[2] Denodo Technol Inc, La Coruna 15003, Spain

来源：

DATA & KNOWLEDGE ENGINEERING | 2007年 / 61卷 / 02期

关键词：

technologies of DBs/mediators and wrappers; data mining/web-based information; Web/web-based information systems;

D O I：

10.1016/j.datak.2006.06.006

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

In order to let software programs gain full benefit from semi-structured web sources, wrapper programs must be built to provide a "machine-read able" view over them. Wrappers are able to accept a query against the source and return a set of structured results, thus enabling applications to access web data in a similar manner to that of information from databases. A significant problem in this approach arises as Web sources may undergo changes that invalidate the current wrappers. In this paper, we present novel heuristics and algorithms to address this problem. In our approach the system collects some query results during normal wrapper operation and, when the source changes, it uses them as input to generate a set of labeled examples for the source which can then be used to induce a new wrapper. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：331 / 358

页数：28

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