anchor.diff:  PIID,PIID
   Referenced IDV PIID,Referenced_IDV_PIID
   Vendor DUNS,Vendor_DUNS
  -Action Obligation,Action_Obligation
  +Action.Obligation,Action_Obligation
   Contracting Department Name,Contracting_Department_Name
   Contracting Agency Name,Contracting_Agency_Name
   Funding Department ID,Funding_Department_ID
  
positive.code: Product Or Service Code,PSC_Code
  PSC Description,PSC_Description
  Product or Service Description,PSC_Description
  Contracting Agency ID,Contracting_Agency_ID
  Contracting Department ID,Contracting_Department_ID
  Funding Agency ID,Funding_Agency_ID
  Place of Performance City,Place_of_Performance_City
  
negative.code: Award or IDV Type,contractactiontype
  Multiple or Single Award IDV,multipleorsingleawardidc
  Type of Contract,Pricing.Mechanism.Code
  Pricing.Mechanism.Code,Pricing_Mechanism_Code
  Action Obligation,Action.Obligation
  contractingofficeagencyid,Contracting.Agency.ID
  Index,Index
  