Restrict Data from Appearing in File

Hi,

New to XML. Would like to restrict a file to only contain deltas made instead of containing info on all subjects.

Was thinking of using a definition and mappings..

EG:   <MappingDefinitions>
        <definition>
           <criteriaset>
               <criteria item="estatus_reason_xref">DM,PR,MERIT,REHIRE,COST OF LIVING,NEW ASSIGNMENT</criteria>
               <criteria item="paygroup_xref">6468</criteria>
           </criteriaset>
           <mapping>
              <mapto columnname="CompensationChangeReason">
              <Value>estatus_reason_xref</Value>
              </mapto>
              </mapping>
        <definition>
     </MappingDefinitions>

So basically I want the file that will be generated to only contain information if the estatus_reason_xref is filled out with the options listed. Any other information should not be included in the file.

Am I on the right track?