  Ac and dc magnetotransport data in the normal state of YBa2Cu3O7 are analyzed
within Fermi-liquid and non-Fermi-liquid models. In the Fermi-liquid analysis
we use the Fermi surface deduced from band structure calculations and angular
resolved photoemission experiments and assume that the electron relaxation rate
varies over the Fermi surface. The non-Fermi-liquid models are the
two-dimensional Luttinger liquid model and the charge-conjugation-symmetry
model. We find that the existing experimental data can be adequately fitted by
any of these models. This work provides a framework for the analysis of
experiments that may discriminate among these models.
