Value attribute for radio controls
Use the Value attribute to select a radio button in a radio control.
For example, to select the sub-control with selection value 2 in a radio control, use the following:
<ItemData ItemOID="frmA.sctB.itmC.radioD" Value="2"/>
To clear the selection, use the following:
<ItemData ItemOID="frmA.sctB.itmC.radioD" IsNull="Yes"/>