LS, I am currently configuring my logging configuration using a property tree. When I include a SimpleEventLog sink, how can I apply an event type mapping to that sink? In the stated example this is done before the sink is added to the core: typedef sinks::synchronous_sink< sinks::simple_event_log_backend > sink_t; boost::shared_ptr< sink_t > sink(new sink_t()); sinks::event_log::custom_event_type_mapping< severity_level > mapping("Severity"); // . define mapping here . sink->locked_backend()->set_event_type_mapper(mapping); // Add the sink to the core logging::core::get()->add_sink(sink); but adding the sink happens behind the scenes when using the configuration utilities. BTW, in the section "Simplified library initialization tools" of the documentation Table 1.15 seems to miss a 'Format' parameter that I assume is still needed? Many thanks, Pieter