  We construct a (coloured) operad RL in the category of sets that may be
thought of as a combinatorial model for the Swiss Cheese operad. By adapting
Batanin-Berger's condensation process we obtain a topological (resp. chain)
operad weakly equivalent to the topological (resp. chain) Swiss Cheese operad.
As an application, we exhibit models for relative loop spaces acted on by Swiss
Cheese type operads (in dimension 2).
