Figure 3 depicts the relationships between the research topics and the base (scenario-like) specific opportunities which can already be realized today and which make use of the according technological and non-technological aspects. Dotted arrows indicate gaps between the current capabilities of the respective topic and the requirements put forward by the respective opportunity, whilst closed-line arrows indicate that the state of the art technology is sufficient for the direct requirements and can be used for the according purposes; they also indicate which opportunities inherit technological bases from one another. As such, e.g. public cloud provisioning bases on private cloud technologies, but requires additional capabilities in the area of scalability, as the applications running on public clouds are not known in advance as opposed to private cloud infrastructure; in order to fully support all user requirements, public clouds will also require that legalistic issues, such as data location is addressed.