Office Open XML (docx), to be fair, is a non-proprietary standard. Microsoft has been forced into that by the EU; and they keep messing with it, but it is actually technically "open".
It is open only on paper - at least half of it MSO-specific compatibility cruft, plus real documents often contain binary blobs that aren't described in the standard. Name "open" is a lie in this case. Moreover, it's made in ISO only because of corruption of these standardization bodies. It wasn't even properly reviewed!
xvilka|3 years ago
phendrenad2|3 years ago