On 7/2/15, 8:51, "Edward Lewis" <edward.le...@icann.org> wrote: >What I mean by rules inconsistently applied is a case of apparently >mis-aligned RFCs on ENUM. In one RFC, domain names were presented as >conversions to ASCII and the other following the rules of the old RFC for >escaping characters. Specifically, a back-slash was the issue, in one RFC >it was bare, in the the other escaped, and this difference caused >implementers of ENUM code headaches.
RFC 5483, section 2.4 talks about this (and gives an example plus a citation of an "errant" RFC) - although related to regular expressions in NAPTR Resource Record RDATA fields, not to the domain name. This does mention the impact on on-the-wire DNS representations. In the example, the presence of a '+' is the issue in the NAPTR-held regular expression. But the same would be true if it were inside a domain name.
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