Overview of the SOS Cep&RRL processing that is common to Cepheids and RR Lyrae stars. Rectangles show different processing modules of the general trunk, with names highlighted in boldface. Their outputs are indicated within parallelograms. The figure is updated from Fig. 1 of Paper 1 to include the processing of the G_BP and G_RP time series and the search for a third periodicity for Cepheids. A further addition for DR2 is the selection of the region of the sky where the sources are located, whether LMC, SMC, or All-Sky (see text for details).