Direct possession has a close relationship with inalienability in the Oceanic linguistics. Their inalienability had to be rigorously guarded. To counter this act, the French developed the principle of the inalienability of the crown. In the German Enlightenment, Hegel gave a highly developed treatment of this inalienability argument. The "learning of feuds" started with the inalienability of the fief as a starting point. Biak contains three subsets of inalienability&colon; body parts, Kinship, and locational. Various definitions of inalienability include non-relinquishability, non-salability, and non-transferability. Aboriginal title is one example of inalienability (save to the Crown) in common law jurisdictions. Cross-linguistically, inalienability correlates with many morphological, syntactic, and semantic properties.