  Parity violation in elastic electron-nucleon scattering is studied with the
basic goal of improving the understanding of electroweak hadronic structure
with special emphasis on the strangeness content in the nucleon. Models for the
parity-violating (PV) asymmetry are provided and compared with the world data
measured at very different kinematics. The effects introduced in the PV
asymmetry due to alternative descriptions of the hadronic structure are
analyzed in detail. In particular, a wide selection of prescriptions for
dealing with the electromagnetic and neutral current weak interaction nucleon
form factors, including the most recent ones used in the literature, is
considered.
