To improve data analysis in cybersecurity, I present a plan to build a formal ontological representation of data ownership and sovereignty in cyberspace, alongside with the cyberattacks that threaten them. I argue that modelling these phenomena by making use of ontologies allows for coherent integration of data coming from diverse sources, automated reasoning over such data, as well as their analysis and reuse. Existing ontological tools in cybersecurity can be ameliorated by connecting them to neighboring domains such as law, regulations, governmental institutions, and documents. Moreover, they will benefit from the introduction of clear competency questions and of the technical terminology to answer them. In the course of the paper, I propose metrics to evaluate currently existing ontological tools to create formal representations in this domain, and I provide a plan to develop such representations and to extend current ontological tools when they are lacking.