Kernrechtsfrage
Whether the constitutional complaint could challenge alleged misapplication of federal law (Art. 343 OR, Art. 8 ZGB).
Extrahierter Entscheid
Those complaints were not admissible by constitutional complaint because they could be raised by appeal on questions of federal law.
Extrahierte Begründung
Under the principle of absolute subsidiarity, constitutional review is unavailable where the alleged error can be invoked through another remedy.