  We describe identical particles through their extrinsic physical properties
and operationally with an operator of selective measure Mm. The operator Mm is
formed through non-symmetrized tensor product of one-particle measurement
operators, so that it does not commute with the permutation operator P. This
operator of selective measure Mm is a local operation (LO) if it acts on
physical systems of distinguishable particles, but when Mm acts on the Hilbert
sub-space of a system with a constant number of indistinguishable particles
this can generate entanglement in the system. We will call entanglement by
measurement (EbM), this way of producing entanglement. In this framework, we
show entangle production examples for systems of two fermions (or bosons) when
the operator Mm has two-particle events that are not mutually exclusive.
