Sources :
http://wiki.pentaho.com/display/EAI/Latest+Pentaho+Data+Integration+%28aka+Kettle%29+Documentation
http://www.pentaho.fr/
http://en.wikipedia.org/wiki/Pentaho
http://scn.sap.com/thread/366021
contribution 2013 sur PDI
http://expertbi.net/expertbi-knowledge-base/integration-de-donnees-et-etl/pentaho-data-integration/134-la-premiere-transformation-avec-pentaho-data-integration.html
http://etl-tools.info/en/pentaho/kettle-etl.htm
http://help.pentaho.com/Documentation/5.1/0D0/1A0/010/000
https://aboutosi.wordpress.com/2008/05/24/quelle-est-la-difference-entre-une-transformation-et-une-tache/
