How do I create editable forms in an XPS document (like PDF forms with Textbox controls)?

I was looking at the same question. I just looked at the XPS spec and it seems like XPS is only focused on presenting static content. I don't see any provision for the presentation of items such as edit controls. Microsoft has made it easy to move from XAML UI markup to XPS by "flattening" the XAML interface, so I think they expect the interactive interface to be defined in XAML and the page layout information in XPS. This seems to leave a hole in the middle: it renders content that is essentially "static" in the layout, but includes user input fields. -Roy, Satori Labs