is location of

this cage is the location of this rat

my head is the location of my brain

location_of

http://purl.obolibrary.org/obo/RO_0001901

a relation between two independent continuants, the location and the target, in which the target is entirely within the location

Most location relations will only hold at certain times, but this is difficult to specify in OWL. See https://code.google.com/p/obo-relations/wiki/ROAndTime