Iota Subscript - Computer Encoding

Computer Encoding

In the Unicode standard, iota subscript is represented by a non-spacing combining diacritic character U+0345 "Combining Greek Ypogegrammeni". There is also a spacing clone of this character (U+037A, "ͺ"), as well as 36 precomposed characters, representing each of the usual combinations of iota subscript with lowercase α, η and ω, with and without any of the accent and breathing diacritics. In addition, for capitalized ("titlecase") use, Unicode provides a corresponding set of 27 precomposed codepoints with "prosgegrammeni" (ᾳ → ᾼ). Despite their name, which implies the use of an adscript glyph, these codepoints are defined as being equivalent to a combination of the base letter and the combining subscript character U+0345, just like their lowercase equivalents. They may be variously realized with either a subscript diacritic or a full-sized adscript iota glyph, depending on the font design. For use in all-capitals ("uppercase"), Unicode additionally stipulates a special case-mapping rule according to which lowercase letters should be mapped to combinations of the uppercase letter and uppercase iota (ᾳ → ΑΙ).

In the ASCII-based encoding standard Beta Code, the iota subscript is represented by the pipe character "|" placed after the letter.