The vertical line above originates from the use of typewriters. First the base character was typed, then backspace was struck and an apostrophe was typed over the base character. The vertical line was added to Unicode under the impression that this was how the Greek tonos (΄) was supposed to look like. There are no precomposed letters with vertical line above.
Vertical Line Above in Unicode
Characters with Vertical Line Above
| Modifier Letter Vertical Line
|| Combining Vertical Line Above
| Note: Whether this can be said to be the non-combining version of vertical line above is open to debate. This character is used for marking primary stress in IPA, while combining vertical line above is used for marking syllabic consonants in IPA.
Vertical Line Above in Natlangs
Uses of Vertical Line Above
| High tone
|| Min Nan (Pe̍h-ōe-jī orthography)
|| A̍a̍ /a˦/, A̍ⁿ a̍ⁿ /ã˦/, E̍e̍ /e˦/, E̍ⁿ e̍ⁿ /ẽ˦/, I̍i̍ /i˦/, I̍ⁿ i̍ⁿ /ĩ˦/, M̍m̍ /m̩˦/, N̍g n̍g /ŋ̍˦/, O̍o̍ /ə˦/, O̍ⁿ o̍ⁿ /ɔ̃˦/, U̍u̍ /u˦/, U̍ⁿ u̍ⁿ /u˦/
|| There is much variation in the tones and vowel qualities between different dialects of Min Nan. The vowel qualities here seem to be an approximation between the dialects, while the tones here are as they are pronounced in Taipei. This is a so called stopped tone; the vowel must be followed by one of Pp, Tt, Kk, Hh /p, t, k, ʔ/. In the same environment without this diacritic, the syllable would have another tone (˧˨ in Taipei).
Vertical Line Above in Phonetic Transcriptions
- ↑ Greek Diacritics at Nick Nicholas' Home Page.
- ↑ Pe̍h-ōe-jī, Current system at Wikipedia.
- ↑ 3.0 3.1 Taiwanese Hokkien, Tones at Wikipedia.
- ↑ International Phonetic Alphabet, Diacritics at Wikipedia.