Kamateri, E.E.KamateriLoutas, N.N.LoutasZeginis, D.D.ZeginisAhtes, J.J.AhtesD'Andria, F.F.D'AndriaBocconi, S.S.BocconiGouvas, P.P.GouvasLedakis, G.G.LedakisRavagli, F.F.RavagliLobunets, O.O.LobunetsTarabanis, K.A.K.A.Tarabanis2022-03-122022-03-122013https://publica.fraunhofer.de/handle/publica/38349510.1007/978-3-642-40651-5_6Cloud Platform as a Service (PaaS) is a novel, rapidly growing segment in the Cloud computing market. However, the diversity and heterogeneity of today's existing PaaS offerings raises several interoperability challenges. This introduces adoption barriers due to the lock-in issues that prevent the portability of data and applications from one PaaS to another, "locking" software developers to the first provider they use. This paper introduces the Cloud4SOA solution, a scalable approach to semantically interconnect heterogeneous PaaS offerings across different Cloud providers that share the same technology. The design of the Cloud4SOA solution, extensively presented in this work, comprises of a set of interlinked collaborating software components and models to provide developers and platform providers with a number of core capabilities: matchmaking, management, monitoring and migration of applications. The paper concludes with the presentation of a proof-of-concept implem entation of the Cloud4SOA system based on real-life business scenarios.en004005006conference paper