Key legal question
Whether the attachment opposition decision could be challenged by civil law appeal and under what federal review standard
Extracted holding
The decision was appealable in civil matters, but review was limited to constitutional violations because it concerned provisional measures.
Extracted reasoning
An attachment-opposition decision by the superior judicial authority is a final cantonal decision under the LTF; as a provisional measure, it may only be attacked for constitutional violations, which must be specifically invoked and reasoned.