Using include directive in ODF reports with relatorio

is there a way to use the include-directive from genshi in ODF reports with relatorio and how is it called?
I know, there is an example with the text template, but this will not work in odf.

We do not support ‘include’ directive in placeholder but you can still manually add it to the ODF xml.
I would say it will be quite complicated to include part of the ODF xml as it is quiet verbose and you could not edit it using LibreOffice and co. But you may use ‘content’ directive if you have some compatible content as proposed in Issue 2068: Allow to include richtext content in report - Tryton issue tracker.