noun
marked section end
Computing term for the end of a marked section, often used in markup languages or data formatting.
マーク区間終了のタグを忘れずに閉じてください。
Don't forget to close the marked section end tag.
Compound of マーク (mark), 区間 (section), and 終了 (end). A technical term likely calqued from English 'marked section end'.