how to read value from one attribute to another

Hi Experts,

I need to add a 5 fields in one C.N,but I have only 4 fields are available in that particular C.N, so I created attribute that i needed ( ex: filed 3) which is model node. Problem is when ever I search I need to get values in those 5 fields,but how to a maintain a relation between them based on object_id. can any one please provide code.

Thanks,

Kumar.