Taming Web Sources with "Minute-Made" Wrappers

Loading...
Thumbnail Image
Penn collection
Database Research Group (CIS)
Degree type
Discipline
Subject
Funder
Grant number
License
Copyright date
Distributor
Related resources
Author
Azavant, Fabien
Sahuguet, Arnaud
Contributor
Abstract

The Web has become a major conduit to information repositories of all kinds. Today, more than 80% of information published on the Web is generated by underlying databases and this proportion keeps increasing. In some cases, database access is only granted through a Web gateway using forms as a query language and HTML as a display vehicle. In order to permit inter-operation (between Web sources and legacy databases or among Web sources themselves) there is a strong need for Web wrappers. Web wrappers share some of the characteristics of standard database wrappers but usually the underlying data sources offer very limited query capabilities and the struc- ture of the result (due to HTML shortcomings) might be loose and unstable. To overcome these problems, we divide the architecture of our Web wrappers into three components: (1) fetching the document, (2) extracting the information from its HTML formatting, and (3) mapping the information into a structure that can be used by applications (such as mediators).

Advisor
Date Range for Data Collection (Start Date)
Date Range for Data Collection (End Date)
Digital Object Identifier
Series name and number
Publication date
1999
Volume number
Issue number
Publisher
Publisher DOI
Journal Issue
Comments
Database Research Group.
Recommended citation
Collection