Abstract of [PWVJ93] Retrospection on the HERMES project: Implementation of a Heterogeneous Transaction Management System, by Aija PalomŠki, Antoni Wolski, Jari Veijalainen, and Jari Jokiniemi. Proc. Third International Workshop on Research Issues on Data Engineering: Interoperability in Multidatabase Systems (RIDE-IMS'93), Vienna, Austria, April 19-20, 1993, pp. 51-54. Abstract The goal of the HERMES project was to conceive means to integrate existing heterogeneous database products in a transaction management system. The project produced the 2PC Agent method based on the 2PC protocol. The method is based on simulation of the prepared state at participating sites and it guarantees serializable executions in the presence of site and transaction failures. A restriction on the behavior of local transactions is imposed: the (necessary) condition called DLRP has to be maintained, meaning no local transaction should update the data read by a subtransaction being in the prepared state. The project experienced a diminishing interest in the part of the industrial supporters, and the prototype software produced was not utilized. Consequently, a question of relevance of the original goals arises.