send a trap and location the specify column in multiple rows(the same table)

Hi Dave and All:
  
 it is a long time no see. :)
  
 1.where I can fill with the warning information when the trap send?
  
 2.If the trap OBJECTS is a scalar,I can configure snmpd.conf,use DisMan monitor the value,and send trap,The NOTIFICATION-TYPE defination is not necessary,is it right?
But how do I implement this method if I want to monitor the value that is a column in one table?
 3.How can I exactly location the column in multiple rows(the same table)when I send a trap?
 just a example,a piece of my mib file:
     HostInterfaceFCEntry ::=
        SEQUENCE {
         fcConnections
          Integer32,
         fcPort
          DisplayString,
         fcStatus
          INTEGER,
         fcWWN
          DisplayString,
         fcSpeed 
          Counter32,
         fcTopology
          Unsigned32
        }
        
and my trap:
     fcTrap NOTIFICATION-TYPE
        OBJECTS { 
          fcPort,
          fcStatus 
          } 
        STATUS     current
        DESCRIPTION "This is just a demo"
        ::= { trapTestingTrapTwoPrefix 1 } 
        
        
Here I want to the trapd routine can tell the receiver which fcport's status changed,so I put two column values in OBJECTS domain,but in my prototype implement,I failed.
 Who can tell me how to implement this?

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