> On 2021-10-17, at 21:52, Russ Housley <housley@xxxxxxxxxxxx> wrote: > > > >> On Oct 17, 2021, at 8:54 AM, Carsten Bormann <cabo@xxxxxxx> wrote: >> >> On 2021-10-17, at 14:47, John C Klensin <john-ietf@xxxxxxx> wrote: >>> >>> FWIW, I have no idea whether permission was obtained to extract >>> and reproduce material from X3.4-1968 to act as the basis for >>> RFC 20 or whether the conclusion at the time was that it was not >>> necessary. >> >> (Random fuzzy recollection: I seem to remember that what made me start campaigning for RFC 20 to be a STD was that I wanted to stop people from referencing X3.4 just in order to avoid a downref.) >> >> We should do this more often. > > Wouldn't it have been trivial to add RFC 20 to the downref registry? To those that know about that concept, yes. To those that knee-jerk to an idnits throw-away comment, not so sure. > Of course, there is no need to do it now that it is a standard. > > 0020 ASCII format for network interchange. V.G. Cerf. October 1969. > (Format: TXT, PDF, HTML) (Also STD0080) (Status: INTERNET STANDARD) > (DOI: 10.17487/RFC0020) Indeed, and I think the outcome was a well-deserved advancement. The only RFC that survived from the 1960s or 1970s in std-index… .oOo. But back to the subject: maybe we need a “behind-the-wall-ref” registry… E.g., in IoT we sometimes need to exchange data about temperatures. The quantities and units for that are defined in ISO/IEC 80000, which is paywalled. (Fortunately, the actual definitions in that tome are in the “Definitions” section, most of which are freely available via “OBP” [e.g., [1]] — but that is just distracting from my point.) Of course, we can point to secondary sources such as BIPM’s SI brochure [2], but we wouldn’t accept a document referencing TLS via Wikipedia, would we? So once we have decided we can reference ISO/IEC 80000 with impunity (*), it should be put into a behind-the-wall-ref registry. Grüße, Carsten (*) which seems to have happened with RFC 8428 and RFC 8798 [1] https://www.iso.org/obp/ui/#iso:std:iso:80000:-3:ed-2:v1:en [2] https://www.bipm.org/documents/20126/41483022/SI-Brochure-9.pdf/fcf090b2-04e6-88cc-1149-c3e029ad8232