The Technical Architecture examines a provider-independent instantiation of digital platform ecosystems. Over the course of the project, the compatibility of the architecture will therefore be assessed for different, suitable IaaS providers. In particular, the focus lies on the evaluation of possibilities for a cross- provider implementation (multi-cloud). In this way, the advantages of different providers can be combined within a single instance of the BayernCloud. In addition, the technical architecture is designed to be cross-domain. Concepts for the exchange and combination of domain-specific data are being developed. This includes the development of a cross-domain, instantiatable data schema as well as the investigation and evaluation of various protocols for efficient data exchange. Furthermore, basic services will be designed and prototypically implemented for selected evaluation purposes, which map cross-domain functionalities and enable third-party developers to access BayernCloud more easily.