Eric Brunner-Williams in Portland Maine wrote:
> >Does the example override the rule? > > Of course not! All dns implementations that resolve a.isi.edu are > broken!!! Well, resolving it is something else. It is a valid domain name and is certainly valid for lookups. Being conservative in what gets generated: it is not valid for assignment even if applications allow it to be used as a host identifier. Being liberal in what gets accepted: it is not valid but it resolves so we will use it. Applied globally: it is not valid and should not be used, and apps that choose to ignore the rules do so at some risk (maybe not in this particular case but certainly when it comes to IDNs there will be a large amount of risk from ignoring the rules). We do not have to stick with the two-char rule for i18n hostnames. We do not have to stick with the no-leading/trailing-hyphen rule either. -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
