Solid line over dashed line on power adapters

I have to figure out the output rating on different adapters and was depending on the written values, but some of them have symbols instead and I did not know what two parallel lines, one solid, one broken meant. It means DC voltage, and a horizontal S curve is AC.

Here is a pdf with a lot of more info, note the list of symbols on page 36.
http://www.psma.com/HTML/FILES/22E_88e_CDV.pdf