Questione giuridica chiave
Whether the cantonal ruling was a final or merely intermediate decision under the Federal Supreme Court Act.
Decisione estratta
The ruling was not a final decision; it decided only the preliminary issue of the respondents' heir status and active standing.
Motivazione estratta
The appellate court had not finally resolved the pending reduction action, but only a substantive preliminary question. Such a ruling is an intermediate decision under Art. 93(1) BGG.