Connected: An Internet Encyclopedia
4.1.2. Unsafe characters
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4.1.2. Unsafe characters
4.1.2. Unsafe characters
In canonical form, certain characters such as spaces, control
characters, some characters whose ASCII code is used differently in
different national character variant 7 bit sets, and all 8bit
characters beyond DEL (7F hex) of the ISO Latin-1 set, shall not be
used unencoded. This is a recommendation for trouble-free
interchange, and as indicated below, the encoded set may be extended
or reduced.
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Connected: An Internet Encyclopedia
4.1.2. Unsafe characters