This is the type definition for SLF4j targeted http logging configuration Root element containing configuration for SLF4j HTTP logging This is a replacement for the format attribute. You can use this if your format string does not fit well inside of an attribute. You cannot use both. Leading and trailing whitespace will be stripped, but not whitespace within the log message. This ID will be the SLF4j logger target, it can be used in the backend logger configuration to direct it's output to an appender. See the log4j documentation as for how to do this. The format includes what will be logged. The arguments with % are a subset of the apache mod_log_config found at http://httpd.apache.org/docs/2.2/mod/mod_log_config.html#formats Format configuration element for SLF4j HTTP logging Indicates whether or not to replace a newline sequence (i.e. \r, \n, \r\n) plus any following whitespace with a single space.