[BCP100]   Best Current Practice 100,
              <https://www.rfc-editor.org/info/bcp100>.
              At the time of writing, this BCP comprises the following:

              Cotton, M., "Early IANA Allocation of Standards Track Code
              Points", BCP 100, RFC 7120, DOI 10.17487/RFC7120, January
              2014, <https://www.rfc-editor.org/info/rfc7120>.