I know that the microsoft docx file format is a compressed zip archive. I analyzed it and I think I understand that I can manipulate it by changing the content of the /word/document.xml file inside this file structure.
But after I zip the folder again and try to open it, MS-Word complains with a message like:
"The file ... cannot be opened because its content is causing problems. "
I wonder which is the correct method to zip the content of the xml files after manipulating? Or is there something like a checksum I have overseen?