IDNA does not extend the LDH namespace, but just redefine xx--yyy subset of the space to have new i18n meanings.
Moreover, all the mess around i18n which does not belong to "network standard" , was not addressed and just postponed or ignored.
---------- Dave Crocker <mailto:dave@xxxxxxxxxxxxxx> TribalWise, Inc. <http://www.tribalwise.com> tel +1.408.246.8253; fax +1.408.850.1850