Kernrechtsfrage
Whether the constitutional complaint could challenge the cantonal court's treatment of federal substantive law and proof rules through constitutional arguments.
Extrahierter Entscheid
Those complaints were not admissible as constitutional claims because they in substance alleged misapplication of federal private law and proof rules, which had to be raised by appeal.
Extrahierte Begründung
The Court held that arguments about aArt. 153 ZGB and Art. 8 ZGB, even if framed as arbitrariness or equality violations, concern the application of federal law and therefore fall outside the scope of the constitutional complaint.