  This paper answers Bell's question: What does quantum information refer to?
It is about quantum properties represented by subspaces of the quantum Hilbert
space, or their projectors, to which standard (Kolmogorov) probabilities can be
assigned by using a projective decomposition of the identity (PDI or framework)
as a quantum sample space. The single framework rule of consistent histories
prevents paradoxes or contradictions. When only one framework is employed,
classical (Shannon) information theory can be imported unchanged into the
quantum domain. A particular case is the macroscopic world of classical physics
whose quantum description needs only a single quasiclassical framework.
Nontrivial issues unique to quantum information, those with no classical
analog, arise when aspects of two or more incompatible frameworks are compared.
