> Could someone tell me if all accentuated characters used for
> pinyin writing is include in Unicode ?
Yes, they are all included.
Note however that some rarer characters have to be composed as base character + tone mark. I am speaking of those ideographs that are pronounced with a syllabic nasal (Hm/hm, M/m, Hng/hng, Ng/ng; only a few precomposed characters for these are assigned) or a mid front vowel (Ê/ê), as well as older pinyin styles where the neutral tone was written as either a dot or a ring above A/a, E/e, Ê/ê, I**/i, M/m, N/n, O/o, U**/u, Ü**/ü instead of no mark at all. Also note that formerly the velar nasal (now spelled Ng/ng) was written as eng (U+014A/U+014B) which could take a tone mark.
Attached you find an image of all characters that might have to be composed. When choosing a font for you document make sure the second tone mark goes from bottom left to top right, not vice versa as the acute accent in most other languages.
Charlie
** I, U and Ü only occur when whole words are written with capital letters.
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