Editing Iota subscript (section)

==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, {{lang|grc|ͺ}}), as well as 36 precomposed characters, representing each of the usual combinations of iota subscript with lowercase {{lang|grc|α}}, {{lang|grc|η}} and {{lang|grc|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 code points with "prosgegrammeni" ({{lang|grc|ᾳ}} → {{lang|grc|ᾼ}}).<ref>The difference in number between uppercase and lowercase precomposed characters is due to the fact that there are no uppercase combinations with only an accent but no breathing mark, because such combinations do not occur in normal Greek orthography (uppercase letters with accents are used only word-initially, and word-initial vowel letters always have a breathing mark).</ref> Despite their name, which implies the use of an adscript glyph, these code points 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 ({{lang|grc|ᾳ}} → {{lang|grc|ΑΙ}}).<ref name="nicholas"/> This rule not only replaces the representation of a monophthong with that of a diphthong, but it also destroys the reversibility of any capitalization process in digital environments, as the combination of uppercase letter and uppercase iota would normally be converted back to lowercase letter and lowercase iota. It is therefore strongly recommended,{{By whom|date=April 2023}} both for the integrity of text and for the practical compatibility with digital environments, that lowercase letter and iota subscript should be capitalized in all situations and contexts as uppercase letter and iota adscript. A future revision of the above-mentioned Unicode stipulation is linguistically stipulated and digitally inevitable,{{According to whom|date=April 2023}} as its application is both destructive to the text and impractical in digital applications.

In the [[ASCII]]-based encoding standard [[Beta Code]], the iota subscript is represented by the pipe character "|" placed after the letter.<ref>{{cite web|url=http://www.tlg.uci.edu/encoding/|title=The beta code manual|author=Thesaurus Linguae Graecae|access-date=5 August 2012}}</ref>