  A concept of the generalized quantum measurement is introduced as the
transformation, which establishes a correspondence between the initial states
of the object system and final states of the object--measuring device (meter)
system with the help of a classical informational index, unambiguously linked
to the classically compatible set of states of the object--meter system. It is
shown that the generalized measurement covers all the key known quantum
measurement concepts--standard projective, entangling, fuzzy and the
generalized measurement with the partial or complete destruction of the initial
information contained in the object. A special class of partially-destructive
measurements that map the continual set of the states in finite-dimensional
quantum systems to that one of the infinite-dimensional quantum systems is
considered. Their informational essence and some information characteristics
are discussed in detail.
