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IPA Braille is the modern standard Braille encoding of the International Phonetic Alphabet (IPA), as recognized by the International Council on English Braille. A braille version of the IPA was first created by Merrick and Potthoff in 1934, and published in London. It was used in France, Germany, and anglophone countries. However, it was not updated as the IPA evolved, and by 1989 had become obsolete. In 1990 it was officially reissued by BAUK, but in a corrupted form that made it largely unworkable. In 1997 BANA created a completely new system for the United States and Canada. However, it was incompatible with braille IPA elsewhere in the world and in addition proved to be cumbersome and often inadequate. In 2008 Robert Englebretson revised the Merrick and Potthoff notation〔Englebretson, 2008, ''(IPA Braille: An Updated Tactile Representation of the International Phonetic Alphabet )'', CNIB〕 and by 2011 this had been accepted by BANA.〔(IPA Braille (BANA) ). According to the minutes of BAUK,() BANA had withdrawn its idiosyncratic system by 2008, and BAUK was considering adopting IPA Braille at that time.〕 It is largely true to the original in consonants and vowels, though the diacritics were completely reworked, as necessitated by the major revisions in print IPA diacritics since 1934. The diacritics were also made more systematic, and follow rather than precede the base letters. However, it has no general procedure for marking tone, and not all diacritics can be written. IPA Braille does not use the conventions of English Braille. It is set off by slash or square brackets, which indicate that the intervening material is IPA rather than national orthography. Thus brackets are required in braille even when not used in print. ==Basic letters== The 26 letters of the basic Latin alphabet are the same as in international braille: In addition, there are the following dedicated letters: Following a pattern found in many national alphabets, a few braille letters are reversed to represent a similar letter: thus reversed produces . The choice for may reflect the shape of that letter in print. Many of the vowels are used for modified vowels in national alphabets, such as French Braille. A few other letters such as occur, but only as parts of digraphs. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IPA Braille」の詳細全文を読む スポンサード リンク
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