Scope of Convention ; Statute of limitations ; Fraud ; Formal requirements ; Waiver ; Declaration, Art. 96 ; Conformity of goods ; Guarantees ; Examination of goods ; Lack of conformity notice, timeliness ; Lack of conformity known to seller ; Latent defects ; Installment contracts ; Fundamental breach ; Avoidance ; Damages ; Profits, loss of ; Cover transactions ; Mitigation of loss ; Set-off ; Interest ; Failure of performance, other party