[rules-users] Integrating Drools5.0 into J2EE APP

Hi, Can somebody describe in a high level how the Drools components ( Guvnor,Expert, etc) are integrated into J2EE app. I am looking for these items as part of Drools deployment configuration 1) How are rules saved ( File system or DB ) 2) How is rule versioning enabled ( with Subversion ) 3) Rules and RuleSet granularity . How many rules should go in one DRL. 4) Facts: Are facts defined as POJOs and uploaded to Drools or Declarative FACTs are defined in Drools Guvnor Any links over the web will be great too. thanks Sam