When we import or export a OOXML file it would be good to check (in debug mode) the validity of the document's OPC[1] structure (declared relationship actually exists for exmaple) and XML file validity (presence of the XML namespaces declaration that is used in tags for example). The goal of this EasyHack is to implement this functionality that checks this and trigger it on import and export of files in debug mode (and maybe when an environment variable is set in non-debug mode). [1] https://en.wikipedia.org/wiki/Open_Packaging_Conventions