RE: [idn] I-D ACTION:draft-ietf-idn-nameprep-07.txt

[Yves Arrouye <yves@realnames.com>]

Is it just me (having just browsed through that), or is the new prohibited
table looking strange? It starts with:

0000-0020
007F
0080-009F

so a bunch of ASCII characters are not prohibited anymore. For instance, the
name $$$.com is now allowed. It may be that one expects IDN applications to
do more checks than just Nameprep (for example, check for non-ASCII
characters first), but then why bother with the 0000-0020 and 007F, right?
Anyway, with this, a simple implementation of IDN that relies on the
Nameprep tables only to determine whether a label can be encoded or not,
will allow $$$.com, which isn't changed at all by Punycode.

YA

gabier% ./npdiff -u --name nameprep-06 --name nameprep-07
--- /tmp/npdiff.1716.1  Wed Feb  6 13:37:54 2002
+++ /tmp/npdiff.1716.2  Wed Feb  6 13:37:55 2002
@@ -1367,11 +1367,8 @@
 ----- End Mapping Table -----
 
 ----- Start Prohibited Table -----
-0000-002C
-002E-002F
-003A-0040
-005B-0060
-007B-00A0
+0000-0020
+007F-00A0
 070F
 1680
 180E
gabier% 

In the following, all the characters starting with a - have been removed
from the prohibited table, and are thus allowed by Nameprep.

gabier% ./npdiff -u --name nameprep-06 --name nameprep-07 --char-names
--- /tmp/npdiff.1784.1  Wed Feb  6 13:39:12 2002
+++ /tmp/npdiff.1784.2  Wed Feb  6 13:39:23 2002
@@ -1400,37 +1400,6 @@
 001E 
 001F 
 0020 SPACE
-0021 EXCLAMATION MARK
-0022 QUOTATION MARK
-0023 NUMBER SIGN
-0024 DOLLAR SIGN
-0025 PERCENT SIGN
-0026 AMPERSAND
-0027 APOSTROPHE
-0028 LEFT PARENTHESIS
-0029 RIGHT PARENTHESIS
-002A ASTERISK
-002B PLUS SIGN
-002C COMMA
-002E FULL STOP
-002F SOLIDUS
-003A COLON
-003B SEMICOLON
-003C LESS-THAN SIGN
-003D EQUALS SIGN
-003E GREATER-THAN SIGN
-003F QUESTION MARK
-0040 COMMERCIAL AT
-005B LEFT SQUARE BRACKET
-005C REVERSE SOLIDUS
-005D RIGHT SQUARE BRACKET
-005E CIRCUMFLEX ACCENT
-005F LOW LINE
-0060 GRAVE ACCENT
-007B LEFT CURLY BRACKET
-007C VERTICAL LINE
-007D RIGHT CURLY BRACKET
-007E TILDE
 007F 
 0080 
 0081 
gabier%