Tray-selection for IPP-printers
 

My question is concerning IPP-printing on Windows XP Professional systems.

How is it possible to select a specific type of media tray for an IPP
printing job (to switch between the papersizes in 'ISO a4 tray' and 'ISO a5
tray' for example)?

Are there any special IPP-attributes which I must address in order to
achieve a different tray selection? As far as I know Windows XP only
implements the IPP 1.0 standard.

I'm using a java-based client to connect via IPP to Windows XP and I'm
already able to print documents on the default tray.

Thanks in advance