This [living ontology pattern]] differentiates services that are closely attached to a particular body or a natural setting from those that operate between persons/bodies.
An item is anything worn, carried, or otherwise used by one person or potentially by one person.
A service, in this context/pattern, is anything done by one person for another including permitting them to use something that requires more than their own power to carry or to use, e.g. a vehicle.
A facility is anything tied to a site. See the ark trade for more on this.