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| Diacritical mark | Typed character | Example |
|---|---|---|
| trang (breve) | ( | a |
| mu (circumflex) | ^ | â |
| móc (horn) | + | ơ |
| huyền (grave) | ` | à |
| sắc (acute) | ' or / | á |
| hỏi (hook) | ? | ả |
| ngã (tilde) | ~ | ã |
| nặng (dot below) | . | ạ |
VIQR uses DD or Dd for the Vietnamese letter D, and dd for the Vietnamese letter d. To type certain punctuation marks (namely, the period, question mark, apostrophe, forward slash, opening parenthesis, or hyphen) directly after most Vietnamese words, a backslash (\) must be typed directly before the punctuation mark, so that it will not be interpreted as a diacritical mark.
See Mnemonic Encoding Specification for Vietnamese .