This paper describes a software architecture approach which leads to a simplified solution for information retrieval in multiple backend systems. It is mainly based on the core ideas of service oriented and pattern oriented software architectures and supports the creation of simple structured, changeable retrieval systems with a unified user interface. It is mainly focused on the special needs of typical healthcare information system landscapes. The architectural approach has already been tested within a University Hospital Portal System which allows unified personalized access to patient dependent medical data to externals like related hospitals or resident doctors.