Error 1: According to its array, this array needs a SuperOrdinate element. Error 2: No root array. Error 3: It is not allowed to have more than one preferred term per concept in a thesaurus that suports only one language. Error 4: Inconsistancy between broader and narrower Error 5: Inconsistancy between broader and narrower Error 6: A NonPreferredTerm has an invalid value in the USE element. Error 7: A PreferredTerm has an invalid value in the UF element. Error 8: A UF is missing from the preferred term.