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http://www.unicode.org/charts/ (characters)

http://www.unicode.org/charts/symbols.html (geometrical shapes etc)

As I understand only UTF-8 is supported, so forget characters for UTF-16 and UTF-32 (but you rarely need these anyway)

UTF-8 can represent any Unicode character.

yeah i confused that with ISO 10646 (has the 3 levels which specify unicode, not all levels support the same characters) and UCS2, which UCS2 is essentially UTF-16, so i meant if he used any characters bytecoded in UTF-16 essentially he'd have a problem, although utf-8 doesnt support certain octets. UTF-8/16 were not yet part of the standard before UCS version 2.0. Been a while I guess since i got updated

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