We no need to depend on OR.
we will write the property and values in the script 
statements it self. so that qtp will identify based on that 
properties. no need to depend on OR

ex: window("flightreservation")winedit("userid").set "siva"
with the above example it will go to identify the userid 
edit box using OR

and where as in Discriptive programming.

window("attachedtext:flightreservation")winedit
("attachedtext:userid",.......(no of values to 
identify).set"siva"