The birt plugin is one of the OFBiz plugins.
1. OFBiz Flexible Reports
One of the functionalities of the birt plugin are the "OFBiz Flexible Reports"
There is an announce with some history in the OFBiz blog: Reporting in Apache OFBiz® and the OFBiz Flexible Reports
2. Technical Documentation
Unresolved directive in birt.adoc - include::_include/bt-creating reports.adoc[leveloffset=+0]
Unresolved directive in birt.adoc - include::_include/bt-using the birt report designer.adoc[leveloffset=+0]
Unresolved directive in birt.adoc - include::_include/bt-report master creation.adoc[leveloffset=+0]
3. User documentation
Unresolved directive in birt.adoc - include::_include/bt-how to use flexible reports.adoc[leveloffset=+0]
Unresolved directive in birt.adoc - include::_include/bt-help.adoc[leveloffset=+1]