What character separates fields when inserting sheet from file?

In OpenOffice, I created a file where each line had fields separated by ~ (tilde). When inserting sheet from such a file, each line became a row in the spreadsheet and each tilde separated field on that line became a column in that row.

Using that technique in LibreOffice does not work. What character should be used to separate fields for LibreOffice?

Clair Garman

What character should be used to separate fields for LibreOffice?

obviously[x]other~

I found the answer in the Calc PDF file under Opening CSV files on p. 21.
In LibreOffice one opens the CSV file. In OpenOffice one inserts a sheet from a file.