This section specifies which characters are legal and illegal.
If you want to be sure that your legacy documents can be opened and read
in all cases, and when the filename uses all regional characters, make sure
the legacy documents use the ISO-646 subset of characters: only the ISO-646
subset of characters is authorized (with the limitations described below).
What is the ISO-646 Subset?
ISO-646 provides the subset of characters common to all code pages, and
is included in all industry standard code pages such as ISO8859-x, EUC-xxx,
etc.
The ISO-646 subset contains the principal symbols and characters you
may need to use for naming documents:
This corresponds to an encoding of characters on 7 bits. The preceding
illustration must be read the following way:
column, line
For example, the "LATIN CAPITAL LETTER A" possess the hexadecimal code
41 . The character set contains the following:
- characters A to Z (upper and lower case)
- numbers 0 to 9
- and certain special characters.
Control characters (the "0" and "1" columns in the illustration above)
are not supported.