The input objects can be of different sizes.  If the sizes are different, 
the size of the output object's data will be the maximum of the data sizes 
of the input objects.  When resizing, the input data are padded with a 
constant value that is defined internally by the operation being performed.  
If the input objects have map data as well as value data, the maximum data 
size is determined after mapping.  
.sp
The subobject position attribute of Input 2 is applied as an offset
before the final output object size is determined and before the 
operation is performed.  
The subobject position of the first input object is not applied.
.sp
The subobject position attribute of a data object defines the coordinates
at which that subobject was located in its parent data object.  This attribute 
may be automatically set by programs such as the Extract operator 
(DATAMANIP::kextract), or it can be explicitly set by using the Set Data 
Attributes operator (DATAMANIP::ksetdattr).  The subobject position 
coordinates can be printed using the Print File Information operator 
(DATAMANIP::kfileinfo).
