The European Union will investigate Microsoft’s support for the Open Document Format (ODF) in Office. It wonders whether the move increases competition.

This comes just a day after Microsoft, with great fanfare, said it would add support for ODF, Adobe PDF and even the XML Paper Specification in an Office Service Pack due next year.

ODF support will be introduced to Office even before it has full OOXML support, writes Andy Updegrove at Slashdot. He wonders whether that format will carry a GPL-compatible promise on patents. So do I.

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Also: Is Microsoft Office in trouble?