  Quantum theory describes multipartite objects of various types: quantum
states, nonlocal boxes, steering assemblages, teleportages, distributed
measurements, channels, and so on. Such objects describe, for example, the
resources shared in quantum networks. Not all such objects are useful, however.
In the context of space-like separated parties, devices which can be simulated
using local operations and shared randomness are useless, and it is of
paramount importance to be able to practically distinguish useful from useless
quantum resources. Accordingly, a body of literature has arisen to provide
tools for witnessing and quantifying the nonclassicality of objects of each
specific type. In the present work, we provide a framework which subsumes and
generalizes all of these resources, as well as the tools for witnessing and
quantifying their nonclassicality.
