2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187021The success of recently proposed models for describing rapidity-gap events in DIS at HERA, in terms additional colour exchange between the struck system and the proton remnant in boson-gluon fusion events, are found to rely heavily on the absence or artificial suppression of perturbative gluon emission in the forward region. A model without such suppression is presented, which cannot describe the rapidity-gap events without a pomeron-inspired mechanism.2 pages. To be published in the proceedings of the Durham workshop on HERA physics, September 1995High Energy Physics - Phenomenologytext