In the last years, data have been increasingly considered as resources, in the midst of various and possibly contradictory values, objectives and interests. For example, data from smart farming equipment can be used to gain insights as to the properties of the farm soils and thus help tailor the required intrants. Data from wearable fitness trackers can provide information on the health of individuals wearing them and thus help tailor medical treatment. Data are also expected to feed the development of AI, for example by training algorithms in various scenarios. Until recently, data were not or little regulated as such. Now, the EU legislature attempts to incorporate the resource function of data in law. Once toyed with, the option to establish data ownership – in the form of a ‘data producer’s right’– was soon abandoned. Following the European Data Strategy of the Commission, the EU has embarked on the path of a data-specific (sui generis) and data-focused set of legislations. The objective of the EU therein is to add to data protection, rules that account for the function of data as a resource with the ambition to establish and support data markets. The Data Act and the DGA – the focus of this book – are thus expected by the EU legislature to constitute the private law for data – or even a ‘data law’. Such EU data legislation will then be complemented with ‘public law’initiatives as part of data spaces regulations.