Abstract
WebSmatch is a flexible, open environment for discovering and matching complex schemas from heterogeneous Web data sources. It provides three basic functions: (1) metadata extraction from data sources; (2) schema matching, (3) schema clustering to group similar schemas together. WebSmatch is delivered through Web services, to be used directly by data integrators or other tools with RIA clients. It is implemented in Java, delivered as Open Source Software (under LGPL). WebSmatch has been used by Data Publica and CIRAD to integrate public and private data sources.