This two-volume set LNCS 4275/4276 constitutes the refereed proceedings of the four confederated conferences CoopIS 2006, DOA 2006, GADA 2006, and ODBASE 2006 held as OTM 2006 in Montpellier, France in October/November 2006. The 106 revised full and 9 short papers presented together with 4 keynote speeches were carefully reviewed and selected from a total of 361 submissions. Corresponding with the four OTM 2006 main conferences CoopIS, ODBASE, GADA, and DOA, the papers are organized in topical sections on distributed information systems, workflow modelling, workflow management and discovery, dynamic and adaptable workflows, services metrics and pricing, formal approaches to services, trust and security in cooperative IS, P2P systems, collaborative systems design and development, collaborative systems development, cooperative IS applications, foundations, metadata, design, ontology mappings, information integration, agents, contexts, similarity and matching, resource selection and management, P2P-based systems, grid file transfer, parallel applications, scheduling in grid environments, autonomous and autonomic computing, grid infrastructures for data analysis, access control and security, programming aspects for developing scientific grid components, databases and data grids, distributed applications, evaluation, services, communications, searching techniques, types and notations, adaptivity, middleware, distribution support, and self-organisation.