The proposed standards have been updated based on feedback and the proposal for Additional Object Information (AOI) storage has been outlined.
You can get the draft document here:
DesktopX Standards
You can get a sample CUI file here:
Sample CUI File
You can get a sample AOI file here:
Sample AOI File
You can get a dxpack showing the basics of interaction here:
Sample CUI access using DesktopX
Note that the samples assume that the dxCUI.xml file is in your DesktopX directory.