William Overington wrote:
> Would a variation selector sequence be something specified
> and encoded by the Unicode Consortium [...]?
Yes. See
<http://www.unicode.org/unicode/reports/tr28/#13_7_variation_selectors>:
"Only the variation sequences specifically defined in the Unicode
Character Database in the file StandardizedVariants.html are sanctioned for
standard use; in all other cases the variation selector cannot change the
visual appearance of the preceding base character from what it would have
had, in the absence of the variation selector."
The combinations defined so far are all for math and Mongolian:
http://www.unicode.org/Public/3.2-Update/StandardizedVariants-3.2.0.html
_ Marco
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