idna folding (was Re: idna-bis and '?')

Harald Tveit Alvestrand harald at
Mon Dec 17 00:09:37 CET 2007

--On 16. desember 2007 15:07 -0800 Erik van der Poel <erikv at> 

> To me, this sounds as though one should not be mapped to the other at
> registration time, so I don't understand why people would be
> interested in treating them as the same codepoint at registration
> time.

We must take care with terms here.... I believe both Torbjørn and 
Torbjörn would be interested in a regime where registering "torbjø" 
would not be allowed if "torbjö" was already registered by someone 
else. But that's bundling, not mapping. And the "default member" of the 
bundle (the one that actually goes into the zonefile) would be different in 
Norway and Sweden.

(btw, .no doesn't support bundling at this time. I don't believe .se does 


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