[XeTeX] XeTeX and postscript output

[Kirk Lowery]

I want to use the package xyling (for drawing linguistic tree
diagrams). However, the best way to use it is to generate a postscript
file and then ps2pdf or some such to get the final pdf file.
Otherwise, one can loose "branches", color and other sorts of errors.

After looking at the docs, it doesn't seem that xelatex will generate
postscript output. Is there a way to do this?

Kirk