After months of debate and controversy, Microsoft will reach a pivotal moment this weekend in its effort to win approval of its Office Open XML document format by a key international standards organization.

The process won’t end there, but the result could play a big part in determining how things play out in the months ahead.

The national bodies taking part in the International Organization for Standards, or ISO, process face a Sunday deadline for submitting their preliminary votes on the proposed standardization of the Microsoft format, commonly abbreviated OOXML.

Read more about it here.