Apache Reference: mod_log_config, LogFormat

LogFormat

Define a Customized Log File Format
Syntax: LogFormat format [nickname]
Example: LogFormat "%h %l %u %t \"%r\" %s %b" clf
Since: Apache 1.0

This directive sets the format of the default log file set by the TransferLog directive or defines a customized format that is available under nickname to the CustomLog directive.