Towards a policy-based distributed data-sharing economy

Large scale data sharing is important, especially now, with more open societies of components such as Smart Cities and the Smart Homes creating data sharing ecosystems. We propose that access to data and knowledge be controlled through fine-grained, userspecified explicitly represented policies. Fine-grained policies allow stakeholders to have a more precise level of control over who, when, and how their data is accessed. We propose a realisation of a policy language, and supporting socially aware mechanisms, to facilitate data sharing in a distributed environment.