Repetition line

[OCTO]

Reading E Gould's book about newer techniques, Chapter 20 "Freedom and choice" (p607), she speaks about wavy and straight lines to indicate a free repetition.
However, I am not sure exactly what is difference between these two.

I use also a dashed straight line. My setup is like that:

• Wavy = repetition of a phrase
• Line = held tones and boxes that include phrase
• Dashed line = held tones and boxes where both of them include free breaks (small fermatas, or free rests).

Is that anything you would recommend?

[John Ruggero]

Gould mentions that it is up to the composer to assign meaning to these different lines, so there appears to be no consensus. Alternatively, a straight line might mean exact repetition, a curved line might mean varied repetition, and and a dashed line might mean intermittent repetition.