Release 10.1A: OpenEdge Development:
Progress 4GL Reference

” Special character

The double quote (”) encloses character constants or strings. To use quotes within a quoted character string, you must use two double quotes (””), which compile to a single double quote (”), or you must put a tilde (~) in front of any quotes within the quoted character string. (This does not work when passing parameters to an include file.)

See also “ ” Character-string literal.