Document Foundation criticizes Euro-Office for defaulting to Microsoft's OOXML format

Summary

The Document Foundation (TDF), the organization behind LibreOffice, has publicly criticized the Euro-Office open-source web office project for defaulting to Microsoft's proprietary OOXML document format. TDF co-founder Italo Vignoli wrote an open letter accusing Euro-Office of promoting digital sovereignty while effectively supporting Microsoft's lock-in strategies, calling it a "de facto ally of Microsoft." The criticism centers on the claim that by using OOXML—a format developed and controlled solely by Microsoft—control remains with Microsoft rather than fostering true open standards.