AbstractÐAs Web technology spreads, the number, variety, and sophistication ofWeb-based information services is literally exploding. While some effort has been put into managing a single, centrally controlled Web site, current Web technologies offer little help for managing Web-based applications in-the-large. This is partly due to the distributed, heterogeneous, and open nature of such applications. This paper proposes a generic framework for managing Web-based applications which addresses both semantic and managerial issues. Semantic issues are addressed through the inclusion ofa domain model component in the framework which describes the kinds of information that are available. Management issues are treated through a framework which includes formallydefined notions for an information model, information base consistency, transactions, and concurrency control. Thus, the proposed management system provides a semantically robust environment for Web-based information services while allowing for Web source independence. Index TermsÐSemantic interoperability, domain model, change propagation, concurrency control. 1