On 27 Sep 2018, at 8:13, Warren Kumari wrote: > During the discussions on KSK Sentinel and MTA-STS ( > https://datatracker.ietf.org/doc/draft-ietf-uta-mta-sts/20/) the IESG noted > that we recently have twice "reserved" use of a left hand (non-underscore) > label. > > It is strongly felt that a registry to record names like this would be > useful. > > Some examples of these names include: > root-key-sentinel-not-ta-<number>. > mta-sts. > xn--(anything).
xn--(anything) labels can appear anywhere. > Ok, good point.... but, I still think that labels which get special > handling should be recorded *somewhere*, simply to satisfy the principle of > least astonishment... Fully agree. However, the registry should probably be for "special handling", not just for left-most position. > > So, does would anyone be willing to volunteer to write a "Special Use > Labels" document (similar to draft-ietf-dnsop-attrleaf) simply creating a > registry for "these left hand labels are special / funny in some way" ? Sure. --Paul Hoffman
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