x1=p1=s2 owns private property x2=p2=s1 under law/custom x3=p3; x2 is proprietary.
Technically, a private owner can freely give all usage rights as in the case of open source software, e.g. «po'ecru fi la'oi MIT», where an ownership translates into effective non-ownership. If not specified, whether this is consented to or not might be implied by context, as in the notion of implied consent in some cultures. See also: tcinyra'igau (e.g. «lo se po'ecru cu te tcinyra'igau»/«ro krali cu te tcinyra'igau»), fingubni (open source), po'ecru (consent), fukpo'e (copyright), krasi (right), praselva'i (capital), ja'erkai (effectively).