Kernrechtsfrage
Whether the Hague Child Abduction Convention applied and the child's habitual residence was Austria.
Extrahierter Entscheid
The Convention applied because the child had been habitually resident in Austria and the mother retained custody; the father's arguments about an alleged stratagem and prior consent did not change that.
Extrahierte Begründung
An unlawful retention does not by itself prevent the establishment of habitual residence. The fact that the child had previously stayed in Ticino with the mother's consent was irrelevant once he had returned to Austria and the mother was the custodial parent.