Kernrechtsfrage
Whether the Federal Office for Migration had standing to file an administrative law appeal against the cantonal detention decision.
Extrahierter Entscheid
The office had standing because it may appeal to ensure uniform application of immigration law and to have a concrete legal issue decided.
Extrahierte Begründung
Its appeal right is not limited to unresolved legal questions and does not require a special public interest beyond the need to review a real legal problem in a specific case.