2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43485We present a concise review of the theoretical status of the rare semileptonic B -> X_s l^+ l^- decays in the standard model. Particular attention is thereby devoted to the recent theoretical progress concerning, on the one hand the next-to-next-to-leading order QCD calculation and, on the other hand the analysis of phenomenological important subleading electroweak effects.7 pages, 1 figure; Talk given at XXIXth Rencontres de Moriond Electroweak Interactions and Unified Theories, La Thuile, Aosta Valley, Italy, March 21-28, 2004High Energy Physics - Phenomenologytext