This document aims to present the methodology for building a DECODE ontology useful to support the DECODE goals, especially in relation to smart contracts i) for checking compliance in the personal data protection domain; ii) for managing the data sovereignty; iii) for the creation of data commons. A little proof-of-concept is presented in this deliverable. It is not an objective of this work to build a DECODE ontology that needs, by definition, at least one year of analysis, modelling, representation, evaluation, validation and refinement. The main aim is to provide a methodology for building DECODE ontology, to evaluate pros and cons concerning technical solutions, to provide some examples integrated with the scenario of DECODE.

DECODE was funded by the European Union's Horizon 2020 Programme, under grant agreement number 732546.