Key legal question
Whether the cantonal court correctly declined ratione materiae jurisdiction of the ordinary first-instance court.
Extracted holding
The Federal Supreme Court held the complaint about jurisdiction was largely inadmissible because the decisive characterization of the contract under cantonal law could not be challenged merely by invoking federal contract provisions.
Extracted reasoning
The competence rule in cantonal law referred to federal tenancy notions, but their interpretation was a matter of cantonal law; only arbitrariness or constitutional violations could be reviewed.