[BCP190]   Best Current Practice 190,
              <https://www.rfc-editor.org/info/bcp190>.
              At the time of writing, this BCP comprises the following:

              Nottingham, M., "URI Design and Ownership", BCP 190,
              RFC 8820, DOI 10.17487/RFC8820, June 2020,
              <https://www.rfc-editor.org/info/rfc8820>.