  A parametrization of the Bose-Einstein correlation function of pairs of
identical pions produced in hadronic e+e- annihilation is proposed within the
framework of a model (the tau-model) in which space-time and momentum space are
very strongly correlated. Using information from the Bose-Einstein correlations
as well as from single-pion spectra,it is then possible to reconstruct the
space-time evolution of pion production.
