backgroundimage — Declare the background image that should be used in the ReST
applications when referencing this package.
If the backgroundimage element appears in an
application's attributes then the given image will appear as a watermark
in the background of ReST applications as they refernce this package. The
image could be included in the ReST package or reference an image that
appears in a web space.
The following elements are valid parents of backgroundimage:
explorerattributes, installerattributes, monitorattributes.