has_availability
Use it like this:
- [ #has/_availability :: ItemAvailability ] or
- [ has_availability :: ItemAvailability ]
The availability of this item—for example In stock, Out of stock, Pre-order, etc.
Relation describes that: [ #has_/domain :: Demand, Offer ] ( #has_/name :: has_availability ) ( #has_/range :: ItemAvailability )