  We study two and three jet events with a large rapidity gap at HERA. Unlike
in the Ingelman-Schlein approach we do not adscribe a structure to the Pomeron.
Instead, the coupling of the Pomeron to quarks or gluons is taken pointlike,
which makes the model easy to test: the only degrees of freedom are the
coupling constants of the Pomeron to the quarks or the gluons and a cutoff
procedure to keep the Pomeron-gluon coupling well behaved.
