It would be great if there was a means of exporting a XamDataChart to a vector format such as EMF or SVG.
This solution would be far more useful than exporting the chart to an image file like PNG or JPEG. Exporting in a vector format would allow a chart to be generated and placed into a report (word or powerpoint) and still support zooming in on the data without reloading the data source.
Any WPF Visual can be saved to XPS but in the case of the XamDataChart the resulting XPS content totally depends on how the chart was rendered to the screen. In other words, you only get the level of detail in the XPS file that you were zoomed when the XPS was created.
Please use a more interchangeable format and not just XPS. XPS requires special software on non-Microsoft platforms.