Abstract
The digitalization of the economy and technological innovations are pushing central banks to investigate new forms of digital money. The concept and design of digital currencies have been investigated by central banks for some time. Although much progress has been made towards a convergence on defini- tions, the term Central Bank Digital Currency (CBDC) is still used to refer to a number of concepts. In this paper we address this issue by extending and refining our previous work, the Reference Ontology of Money and Virtual Currencies, to provide a semantic foundation for the concept of CBDC.