Representation of neutral tone in pinyin and bopomofo

[Eric Muller]

Is it correct that:

- in bopomofo, the neutral (or light) tone is represented by U+02D9 ˙ 
DOT ABOVE, and in the text representation, that character follows the 
bopomofo characters of the syllable (just like all the other characters 
for tones)

- in pinyin, the neutral tone is typically not marked, but it may be 
marked. When that's the case, U+02D9 ˙ DOT ABOVE is used.


When U+02D9 is used in pinyin, where it is in the character sequence? 
before the syllable to which it applies (where it is displayed) or after 
(like in bopomofo)?

When U+02D9 is used in bopomofo, it needs to be displayed before the 
syllable. Is the display position simply "before the nearest preceding 
character from the set {U+3105 ㄅ BOPOMOFO LETTER B ... U+3119 ㄙ 
BOPOMOFO LETTER S, U+31A0 ㆠ BOPOMOFO LETTER BU ... U+31A3 ㆣ BOPOMOFO 
LETTER GU}"?

Thanks,
Eric.