Xara Xtreme Pro supports XPS export (and includes a beta import filter).

XPS is an entirely new ‘page description’ file format invented by Microsoft. The benefit of XPS format is that it’s vector based, and so is ideal as a resolution-independent portable document format. Fonts are embedded into the document and so you are assured of a very high quality WYSIWYG document. If you’re using Windows Vista you can view and print these document directly. If you’re using older versions of Windows you can obtain a free XPS Viewer download from the Microsoft web site to provide viewing and printing of these files.

It should be noted that the Xara XPS export does not use the Microsoft standard XPS print system, but writes XPS files directly which ensures a far higher fidelity, and far smaller XPS files.

XPS supports advanced vector features such as transparency, CMYK colors and embedded fonts.