With voting underway, critics contend there is already an ISO/IEC standard intended for documents — the Open Document Format.

Microsoft Office’s Open XML or OOXML is the default file format for documents built and used by Office applications. The Linux Foundation says the format “is specific to Windows and other Microsoft products,” it relies on references to “many Microsoft proprietary specifications” that are not publicly available and it is uncertain whether Open XML “can be used with other operating systems, like Linux.”

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