_openerp_.py
- for rml location
_init_.py
- for initialization of a class( import reportclass)
.py
- for business logic of report or methods of class which will help in rml
.xml
- for a menu display (where report menu open)
.rml
- for your structure of a report
I working with Libreoffice Writer, compare to rml, rml gives better format and accurate spacing compare to LibreOffice Writer.
for more details Visit https://doc.openerp.com/v6.1/developer/05_reports/
and configuration of a report in LibreOffice Writer Visit https://doc.openerp.com/v6.1/developer/05_reports/
and for more details use Google ;-),
Hope this will help you