Parent means “character” as defined here in Unicode: https://www.unicode.org/versions/Unicode17.0.0/core-spec/chapter-2/#G25564 https://www.unicode.org/versions

Parent means “character” as defined here in Unicode: https://www.unicode.org/versions/Unicode17.0.0/core-spec/chapter-2/#G25564 https://www.unicode.org/versions/Unicode17.0.0/core-spec/cha..., effectively code points. Meanings 2 and 3 in the Unicode glossary here: https://www.unicode.org/glossary/#character https://www.unicode.org/glossary/#character