Under the definition of an "idna-canonicalized" host name in section 2.3, step 2 - is it known that the reader will handle NR-LDH and A-labels as locale-insensitive ASCII, or should it be explicitly stated that the lower-case conversion in step "2" should be locale-insensitive, or use English as the locale?

Otherwise even with ASCII input a lower-case operation could result in a U+0049 LATIN CAPITAL LETTER I becoming U+0131 LATIN SMALL LETTER DOTLESS I under the Turkish "tr-TR" locale.

Best regards,
Chris
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