Today, there is no way to design your RTF model with OpenOffice. Indead I tried to create merge field with OpenOffice, but it was not succeeded. How can we create merge field with OpenOffice? In OpenOffice merge field are mailling field, which are linked with database. So we cannot create a merge field without database. I have posted my question into OpenOffice forum, but without answer.
If you know OpenOffice and you discover a solution, you can contact me at firstname.lastname@example.org .
I find it's a great shame that RTFTemplate an Open Source API works only with MS Word and not with OpenOffice.