Trial Bal Data Def. Questions

Hello All,

I am trying to create a data def for our custom Trial Balance report based on the standard TB data def (in R12.1.3)

Couple of questions:

1)  What does the the call "dbdrv: exec java oracle/apps/xdo/oa/util XDOLoader.class" really do?

2)  In the flow of the data def., there is a call to the package "XLA_TB_AP_REPORT_PVT" followed by SQL Statements followed by a call to the before report trigger .  Does the before report fire first and then the sql statements just like in reports?

Thanks,

Monkey