Questione giuridica chiave
Whether the appeal against the cantonal decision on jurisdiction in a futurum evidence matter was admissible only on constitutional grounds.
Decisione estratta
Because the measure sought is a provisional measure, only constitutional rights may be invoked against the jurisdictional ruling.
Motivazione estratta
Evidence preservation proceedings qualify as provisional measures under the Federal Supreme Court Act; therefore Art. 98 LTF limits review to constitutional violations, even for competence questions.