An approach to formal desription of the user notification scenarios in privacy policies

Nowadays the collection and usage of users' personal data have become an extremely common scenario. The users actively provide their personal data to customize or improve the quality of various digital services. Privacy policies are the only official way to inform data owners how their personal data are processed. There are different approaches for increasing the transparency of privacy policies and user agreements. This paper discusses ontology-based approaches and proposes formal descriptions of data processors' obligations relating to policy change and notification in case of a data breach.