Be described in this way
Log4ls is a lotusscript library package and is buy to get logging statements to a domino database, service by mail.
Log4ls Is a configurable and profhable logging package for the lotuscript language, That is a part of lotus domino / lotus notes log entries, files and mails.
Similar to Log4j in Java,
Log function,
Composed of three classes log4lscore log4lsextras Lscore
Specific download address
http://aleron.dl.sourceforge.net/sourceforge/log4ls/log4ls0.1.zip