Make a \draw-line a dotted-line?

[Henrik Frisk]

Hi,

Is it possible to make something like 

relative c' {
       c4 ^\markup { \draw-line #'(0 . 3) }
}

and have the resulting line be dotted or dashed?

I can read here http://lilypond.org/doc/v2.12/Documentation/user/lilypond/Graphic that the \draw-line has a #'thickness property but I'm not sure if it is the *only* settable property. If it is not, where in the documentation can I find its properties?

Thanks for any hints!

/Henrik