I think breadcrumbs can be used for two things:
- showing some kind of hierarchy.
Is it possible to use breadcrumbs only to show hierarchy?
For example consider webpage which aggregates information about shops. Categories and navigation is based on what shop sells. Shops sell multiple things - so can't be assigned to single category "breadcrumb". So making breadcrumbs out of it is quite useless. But all the shops have some location (state and city). I think it would be quite useful to have it shown in Google snippet in form of "State > City", even though there is no dedicated page for aggregating all shops in state or city. Can it be somehow done this way?