Hi, There's an IETF erratum open here: https://www.rfc-editor.org/errata/eid8438 The problem is that http://www.ecma-international.org/publications/standards/Ecma-404.htm no longer works, but this new URL does: https://ecma-international.org/publications-and-standards/standards/ecma-404/ This breaks https://www.rfc-editor.org/rfc/rfc8259 Could the ECMA folks add a redirect for the old .htm URL? Otherwise, the IETF can fix things up, but that seems like a worse solution because these get copied all over the place. Please contact "Andrew (andy) Newton" if you need to take it offline. https://datatracker.ietf.org/wg/#ART