TRANSACTION MANAGEMENT IN DATABASES SUPPORTING WEB-BASED NEGOTIATIONS

摘要

Majority of systems supporting negotiations and collaboration between users require functions provided by database management systems, e.g. data persistency, concur- rency control. I order to be used as kernels of negotiation systems, databases require however important extensions, reflecting the specificity of human interaction. The clas- sical database paradigm assumes that database users communicate only via committed data. Since the users are totally isolated by the database system, each of them has an impression that the system is dedicated to him. When users collaborate to achieve a common goal, this approach is obviously too restrictive. Collaborators have to commu- nicate directly before they agree on a data value.