Instance-based Schema Matching for Web Databases by Domain-specific Query Probing

In a Web database that dynamically provides information in response to user queries, two distinct schemas, interface schema (the schema users can query) and result schema (the schema users can browse), are presented to users. Each partially reflects the actual schema of the Web database. Most previous work only studied the problem of schema matching across query interfaces of Web databases. In this paper, we propose a novel schema model that distinguishes the interface and the result schema of a Web database in a specific domain. In this model, we address two significant Web database schemamatching problems: intra-site and inter-site. The first problem is crucial in automatically extracting data from Web databases, while the second problem plays a significant role in meta-retrieving and integrating data from different Web databases. We also investigate a unified solution to the two problems based on query probing and instance-based schema matching techniques. Using the model, a cross ...

• Type: Conference
• Year: 2004
• Where: VLDB
• Authors: Jiying Wang, Ji-Rong Wen, Frederick H. Lochovsky, Wei-Ying Ma
• Keywords: Database, Schema Matching, Schema Users, VLDB 2004, Web Databases