David Hopwood wrote:
> "Eric A. Hall" wrote: > > Until the 2-char rule inherited from 952 by 1035 is overthrown > What 2-character rule? There is nothing in either the 952, 1035, or > 1123 syntaxes to prohibit single-character labels. The last sentence from the following excerpt of RFC 952: > | 1. A "name" (Net, Host, Gateway, or Domain name) is a text string up > | to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus > | sign (-), and period (.). Note that periods are only allowed when > | they serve to delimit components of "domain style names". (See > | RFC-921, "Domain Name System Implementation Schedule", for > | background). No blank or space characters are permitted as part of a > | name. No distinction is made between upper and lower case. The first > | character must be an alpha character. The last character must not be > | a minus sign or period. A host which serves as a GATEWAY should have > | "-GATEWAY" or "-GW" as part of its name. Hosts which do not serve as > | Internet gateways should not use "-GATEWAY" and "-GW" as part of > | their names. A host which is a TAC should have "-TAC" as the last > | part of its host name, if it is a DoD host. Single character names > | or nicknames are not allowed. "Single character names or nicknames are not allowed." -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
