23 ETB 55 7 87 W 119 w
24 CAN 56 8 88 X 120 x
25 EM 57 9 89 Y 121 y
26 SUB 58 : 90 Z 122 z
27 ESC 59 ; 91 [ 123 {
28 FS 60 < 92 \ 124 |
29 GS 61 = 93 ] 125 }
30 RS 62 > 94 ^ 126 ~
31 US 63 ? 95 _ 127 DEL
8-bit characters "high ASCII" (Decimal 128 - 255)
ISO 8859-1 Latin1 is the current web standard character set but it does not agree exactly with
either Mac Standard Roman or ANSI, the western standards on Mac and PC. TextCruncher maps
both Mac and PC characters to the corresponding ISO 8859-1 Latin1 character, if there is one,
which is the same convention used for escaping 8-bit characters in HTML.
Both Mac and PC character sets contain characters that do not have any ISO counterpart. Those
are the tinted characters in the 8-bit character crossmap chart below. The ANSI characters tinted
green in the chart, have no corresponding characters in Latin1, but are still encoded and decoded
by many browsers using their ANSI values. These ANSI characters and their Mac counterparts
are encoded by TextCruncher using the ANSI value. Mac characters with no ISO counterpart and
no counterpart in the "green" ANSI range, like the Mac apple (240) are encoded as %3F (?).
ANSI positions, like 128, that contain no character are also encoded as ?. Since the Mac-only
characters (pink with no matching character in green) will not be preserved, it's a good idea to
stay away from them in text that is destined to be URL-encoded.
Keep in mind that because the character values after 127 represent different characters on the
Mac and on the PC, most character positions above 127 will URLencode differently depending
on whether TextCruncher is running on a Mac or PC. For example, numToChar(168) is the
registered trademark symbol on the Mac, so it encodes to %AE (decimal 174), which is its
character code in Latin1.On the PC, numToChar(174) is the registered trademark so that
character position is what encodes to %AE.
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