According to QUIP-18 [1], all .qdoc files should be LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only [1]: https://contribute.qt-project.org/quips/18 Change-Id: I4559af21fc9069efa9bf0cbd29c5e86cfdac9082 Reviewed-by: Kai Köhne <kai.koehne@qt.io> (cherry picked from commit 865d0133fcb54c0e22f53dde71ebbca9cbcaf78e) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>