delimiter string
Technical computing term for a string used to separate data fields or tokens.
In CSV files, a comma is used as the delimiter string.
区切り文字 refers to a single delimiter character, while 区切り子文字列 is a delimiter string that can be multiple characters.
Compound of 区切り (delimiter) + 子 (element) + 文字列 (character string). A technical term formed from existing Japanese words.