Questione giuridica chiave
Whether the Federal Tribunal could hear an appeal against the cantonal decision confirming refusal to admit evidence at trial.
Decisione estratta
The appeal was inadmissible because the challenged ruling was an incidental decision on evidence that did not cause irreparable harm.
Motivazione estratta
Decisions on evidence-taking are incidental decisions; under Art. 93(1) LTF they are only appealable if they cause irreparable harm, which was not shown.