FIELD Firma LIKE BonTab.Firma VALIDATE ~
  FIELD Ku_Bon LIKE BonTab.Ku_Bon VALIDATE ~
  FIELD Art_Bon LIKE BonTab.Art_Bon VALIDATE ~
  FIELD Bon_Summ LIKE BonTab.Bon_Summ VALIDATE ~
  FIELD DebBez AS CHARACTER FORMAT "x(30)" LABEL "DebBez"~
  FIELD ArtBez AS CHARACTER FORMAT "x(30)" LABEL "ArtBez"