On 28 Sep 2018, at 11:27, Warren Kumari wrote: > We are adding (at the IESG's request) this (thanks to Terry for the text): > ------ > "The special labels defined here came after extensive IETF evaluation > of alternative patterns and approaches in light of the desired > behaviour (sections 2.1, 2.2) within the resolver and the applied > testing methodology (section 4.3). As one example, underscore > prefixed names were rejected because a number of browsers / operating > systems would not fetch them, as they were not viewed as valid > "hostnames". Attention was paid to the consideration of local > collisions and the reservation of Left Hand Side (LHS) labels of a > domain name, and the impact upon zone operators who might desire to > use a similarly constructed hostname for a purpose other than as > documented here. Therefore, it is important to note that the > reservation of the labels in this manner is definitely not considered > "best practice".
In re-reading this for inclusion in the future registry document, I noticed something wrong. You don't mean "Left Hand Side (LHS)": that almost always used to mean the user name in an email address. I think you instead mean "left-most" with no abbreviation. --Paul Hoffman
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