looking up domain names with unassigned code points

Patrik Fältström patrik at frobbit.se
Mon May 12 05:57:28 CEST 2008

In the implementations of IDNA I am writing (more for DNS registration  
side than lookup side) I am definitely doing multiple A-label => U- 
label => A-label iterations to ensure the string is "stable" and  
accepted regardless of whether the string start with an A-label or U- 
label. That is the easiest way to check that the string is  
"ok" (programmatically). Instead of having different rules depending  
on how the label "enter the system".

I would be very very nervous if some document made it "impossible" to  
do such tests.


More information about the Idna-update mailing list