Mandatory Properties:
1. Text
2. Native Class

mandatory and assistive props are selected while we are 
doing object identification,so wile identifying all 
mandatory props are must and if these are not sufficient 
one by one assistive property is used till it uniquly 
identifies one oblect.
attached text is a property which can be selected in 
mandatory or assis props.

at runtime qtp recognize object using mandatory 
properties..if the mandatory properties are not sufficent 
to recognize the object then it's go to assistive 
properties...attached text is one of the property to 
recognize the object .suppose the edit box of Agent name in 
flight reservation attached text property is "AgentName:"

if u want to change the mandatory or assistive properties 
go to the object identification...already default 
properties of mandatory and assistive properties are 
available in object identification .No one can give the 
answer comman properties of mandatory and assitive 
properties..because the properties are changed depends on 
the environment..like standard windows,web,visul 
basic,java...ok..

Once u record the script qtp caputure the properties of an 
object and give an unique logical name.And find the objects 
by using manadatory properties(class,label),if manadatory 
properties are not unique that will be go for assitive(x,y 
co-ordinates, enable,disable,height,width) properties, if 
it is not unique that will go for oridinal properties 
(location,index).By using these properties qtp identify the 
properties of the object.
 if u have any qurriers contact with me on mail
 mail id:physics143@gmail.com