3 ms·
As of 2018-09-09 though: > While Office 2013 and onward have full read/write support for ISO/IEC 29500 Strict, Microsoft has not yet implemented the strict non
by zelphirkalt 5y ago
As of 2018-09-09 though:
> While Office 2013 and onward have full read/write support for ISO/IEC 29500 Strict, Microsoft has not yet implemented the strict non-transitional, or original standard, as the default file format yet due to remaining interoperability concerns.
From the very Wiki article you linked. I guess this means, that when you implement the standard to its fullest, you can still have issues opening MS Office documents, because they themselves do not adhere to the standard.