After commit e052641d460d8111d3333705aea03ad24822ebbb Author: Michael Stahl <michael.stahl@collabora.com> Date: Thu Apr 16 14:55:25 2026 +0200 xmloff,package,xmlsecurity,oox: add Collabora extension namespace For both ODF and OOXML export, add a new "coext" namespace. New features saved in Collabora Office will not work in LibreOffice Also add a test for it Change-Id: I5626dbcf5e87e06ef94e33d1ce09a091c1557688 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/206987 Tested-by: Jenkins Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org> Signed-off-by: Xisco Fauli <xiscofauli@libreoffice.org> Reviewed-on: https://gerrit.libreoffice.org/c/core/+/207098