I have several xml files as a input and the entire inputstream is like
10 MB. I don't know if I really have all data when I create the
openxml file. Can I somehow create a openxml out of an openxml
template and fill the data later in when I have it?

I have seen that there are different data structures, such as tables,
groupings etc. and if you have done following:
table = Table.new
you can simply save it with: table.to_odt_template. Now, I don't have
only one table but like 10-20. How would I solve this?

Thank you very much,

Steven!