I think [nameprep] handle them inconsistently, that is 038F; 03CE; Case map
and your latter case <A><acute> ==> > <a><acute> is not considered. But: 0390; 03B9 0308 0301; Case map 0587; 0565 0582; Case map do use character combination to normalize the symbols. Liana On Sun, 25 Nov 2001 13:59:39 +0900 "Soobok Lee" <[EMAIL PROTECTED]> writes: > (resent after correcing some formatting error) > > Does a combining sequence inherit the bicameral characteristic of > the leading letter ? > > For example, > > <A acute> can be lowercased into <a acute> ? Then, <A><acute> ==> > <a><acute> ? > <A><acute><diaeresis>... ==> <a><acute><diaeresis>... ? I am not > sure whether it can be. > > Can <I><dot-above> be lowercased into <i><dot-above> or not? > <I dot-above> has no combined form <i dot-above>, but has <i> as its > lowercase form > due to its language context in turkish and azerbaijani. > Is this case just an exception ? > > Soobok Lee > > ----- Original Message ----- > From: Soobok Lee > To: [EMAIL PROTECTED] > Sent: Sunday, November 25, 2001 1:32 PM > Subject: Re: Combining characters (was: Re: [idn] hostname > historyhell) > > > Does a combining sequence inherit the bicameral characteristic of > the leading letter ? > > For example, > > can be lowercased into ? Then, ==> ? > ... ==> ... ? I am not sure whether it can be. > > Can be lowercased into or not? > has no combined form , but has as its lowercase form > due to its language context in turkish and azerbaijani. > Is this case just an exception ? > > Soobok Lee > > > ----- Original Message ----- > From: "Eric A. Hall" > To: "Kenneth Whistler" ; ; > Sent: Friday, November 23, 2001 1:33 AM > Subject: Re: Combining characters (was: Re: [idn] hostname > historyhell) > > > > > > "Eric A. Hall" wrote: > > > > > The specific concern I had is already addressed in nameprep so > there > > > is no need for the exception. > > > > What I am concerned with is the use of domain name which consist > entirely > > of punctuation, or in this case, which consist entirely of > combining > > marks. These represent a rules problem with the principles behind > the > > "safe-set". EG, we forbid domain names like ````````.com using > U+0060, but > > ````````.com may be legal if the combining character U+0300 is > used > > instead. > > > > I get lost in the shrubbery of specs, so can somebody tell me > whether or > > not this is a valid concern? I can't tell for certain what happens > at the > > end of nameprep with such a label. > > > > If this is a problem, a solution might be to change the > prohibition > > against leading hyphen to a prohibition against leading hyphen and > > combining characters. > > > > -- > > Eric A. Hall > http://www.ehsco.com/ > > Internet Core Protocols > http://www.oreilly.com/catalog/coreprot/ > > > > >
