Pick databases have used record marks, attribute marks, value marks, sub-value marks, and sometimes sub-sub-value marks in ASCII 251-255 since the late 1960s. L

Pick databases have used record marks, attribute marks, value marks, sub-value marks, and sometimes sub-sub-value marks in ASCII 251-255 since the late 1960s. Like the control characters this blog post recommends, the biggest obstacle for Pick developers working on modern terminals is how on Earth to enter or display these characters. There's also the question of how to work with them in environments that strip out non-printable characters. This isn't some clever new discovery. It's begging us to repeat the same mistakes that led to the world adopting printable ASCII delimiters in the first place.