  Inadequate availability of patient information is a major cause for medical
errors and affects costs in healthcare. Traditional approaches to information
integration in healthcare do not solve the problem. Applying a
document-oriented paradigm to systems integration enables inter-institutional
information exchange in healthcare. The goal of the proposed architecture is to
provide information exchange between strict autonomous healthcare institutions,
bridging the gap between primary and secondary care. In a long-term healthcare
data distribution scenario, the patient has to maintain sovereignty over any
personal health information. Thus, the traditional publish-subscribe
architecture is extended by a phase of human mediation within the data flow.
DEUS essentially decouples the roles of information author and information
publisher into distinct actors, resulting in a triangular data flow. The
interaction scenario will be motivated. The significance of human mediation
will be discussed. DEUS provides a carefully distinguished actor and role model
for mediated pub-sub. The data flow between the participants is factored into
distinct phases of information interchange. The artefact model is decomposed
into role-dependent constituent parts. Both a domain specific (healthcare)
terminology and a generic terminology is provided. From a technical
perspective, the system design is presented. The sublayer for network transfer
will be highlighted as well as the subsystem for human-machine interaction.
