OOXML is a broken standard. It is bigger than the PDF spec, which already is ridicoulus. Also some crazy bugs inside older versions aren't always reflected ins

OOXML is a broken standard. It is bigger than the PDF spec, which already is ridicoulus. Also some crazy bugs inside older versions aren't always reflected inside the spec. I've seen documents render differntly between Office 2007, 2010, 2013. Mostly between 2010 and 2013 since 2013 is way more correct than the previous versions, still Microsoft use a compability layer to still have a "correct" view. However that is really really aweful.