XPS as one of the PDLs languages is explained in this article. Along with it this page briefly answers the question "what is an XPS document?"...ViewboxUnits="Absolute" Viewbox="0,0,150,84" Viewport="0,0,150,84" ImageSource=...te" Viewbox="0,0,308,222" Viewport="0,0,306.612612612613,221"...