  We examine the space-time evolution of (pre-)hadron production within the
Lund string fragmentation model. The complete four-dimensional information of
the string breaking vertices and the meeting points of the prehadron
constituents are extracted for each single event in Monte Carlo simulations
using the Jetset-part of Pythia. We discuss the implication on the deep
inelastic lepton scattering experiments at HERMES as well as on observables in
ultra-relativistic heavy ion collisions at RHIC, using Pythia also for modeling
the hard part of the interaction.
