  We discuss two measures of entanglement in quantum field theory and their
holographic realizations. For field theories admitting a global symmetry, we
introduce a global symmetry entanglement entropy, associated with the
partitioning of the symmetry group. This quantity is proposed to be related to
the generalized holographic entanglement entropy defined via the partitioning
of the internal space of the bulk geometry. The second measure of quantum field
theory entanglement is the field space entanglement entropy, obtained by
integrating out a subset of the quantum fields. We argue that field space
entanglement entropy cannot be precisely realised geometrically in a
holographic dual. However, for holographic geometries with interior decoupling
regions, the differential entropy provides a close analogue to the field space
entanglement entropy. We derive generic descriptions of such inner throat
regions in terms of gravity coupled to massive scalars and show how the
differential entropy in the throat captures features of the field space
entanglement entropy.
