What is a punctuation character?

Hi, The lexical structure chapter defines the non-terminal uniSymbol as uniSymbol ::= any Unicode symbol or punctuation There is a slight ambiguity here: is that description supposed to be parsed as: (a) "Unicode (symbol or punctuation)", or (b) "(Unicode symbol) or punctuation"? If (b), then what qualifies as "punctuation"? As far as I can tell, that is not defined anywhere in the Report. Is it "punctuation" in the basic ASCII charset or in the extended ASCII charset? Everywhere else the Report has been careful in listing which ASCII characters are meant. Thanks, -- Gaby