[sr-dev] event_route names with underscore before the semicolon

Hello, In the kamailio core cookbook (https://www.kamailio.org/wiki/cookbooks/5.5.x/core#event_route) I read that the name of an event_route should be like this: event_route[groupid:eventid] Where: groupid - should be the name of the module that triggers the event eventid - some meaningful short text describing the event Some modules of kamailio have underscores in the name, for example: http_async_client Years ago a fix have been committed in order to allow underscores in the second part of the name, after the semicolon: https://github.com/kamailio/kamailio/commit/5806703c1ff72243457ff55758f41c3… But it seems that an underscore is still not allowed in the first part of the name: https://github.com/kamailio/kamailio/blob/master/src/core/cfg.lex EVENT_RT_NAME [a-zA-Z][0-9a-zA-Z-]*(":"[a-zA-Z][0-9a-zA-Z_-]*)+ So I wonder if this is a bug in the code or a mistake in the cookbook. Thanks, Luca