Questions[xps-file](ubuntu)

On projects.gnome.org I read that evince/Document Viewer supports xps-files. But when I try to open an xps-file I get the error message

Unable to open document
File type Zip archive (application/zip) is not supported

Reading "the full list of supported document formats" on live.gnome.org I can't find xps there.

Now I ask myself (and you): Isn't Document Viewer able to open xps-files, or is there something wrong with that xps-file I try to open?

I specifically want to do this with Ubuntu 11.10 Oneiric.

I'd like to see a solution for Evince or Gnome in general, not get a recommendation for a KDE application like here.

Some times I have to deal with XPS files (XPS is a Microsoft's rival to Adobe's PDF format, technically a zipped XAML (XML)).

Can I view them in Ubuntu? Or, maybe, I could even produce them?