RE: Jmena domen podle RFC

From: Lubos RYBNICEK (mosek@admiton.cz)
Date: 14. 03. 2000, 19:08 CET


Diky za radu,
ale na tyhle uz sem taky koukal, ted sem je pro jistotu prosel znova, vcetne vsech updatu, ale bohuzel sem tam nenasel nic novyho. Cast, kde se vsechny rfc zminuji primo o syntaxi jmen je ve vsech pripadech stejna:

--------------
...the user should satisfy both the
rules of this memo and those in RFC-822..
The following syntax will result in fewer problems with many
applications that use domain names (e.g., mail, TELNET)
<domain> ::= <subdomain> | " "
<subdomain> ::= <label> | <subdomain> "." <label>
<label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
<ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
<let-dig-hyp> ::= <let-dig> | "-"
<let-dig> ::= <letter> | <digit>
<letter> ::= any one of the 52 alphabetic characters A through Z in
upper case and a through z in lower case
<digit> ::= any one of the ten digits 0 through 9

The labels ... must
start with a letter, end with a letter or digit, and have as interior
characters only letters, digits, and hyphen.  There are also some
restrictions on the length.  Labels must be 63 characters or less--------------

Tohle je ve vsech RFCckach, co sem nasel. Porad z toho plyne ted samej problem. A to: JAK JE TO VLASTNE S CISLAMA NA ZACATKU DOMENY? (a to uz vubec nemluvim o domenach typu "hp.com", "i.cz" apod :-)) Vsechny tyhle domeny evidentne existujou a fungujou, ale veskery RFC jasne rikaji, ze domena cislici zacinat nesmi (viz ten kousek nahore)..
Zkratka a dobre, vi nekdo o tom, ze by nektery rfc vyslovne povolovalo takovy zverstvo treba jako 1001.cz (nic proti www.1001.cz, je to skvelej web) - byla v nem presne uvedena gramatika domenovych jmen, ktera by updatovala gramatiky z #821 a #822??

Lubosh

> Precti si 1034, 1035, pripadne vsechny jejich updaty - na mesic dost cteni
> :-)
> 
> Taky me zarazi kdyz jsem se v 1034, 1035 docetl, ze nemaji existovat
> dvoupismenne domeny druhe urovne a uvidel jsem hp.com> -- 



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