Revision control
++ <?xml version="1.0" ?>
++ <!--
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++ -->
++ <scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" name="ids2">
++ <state id="foo.bar"/>
++ <state id="foo-bar"/>
++ <state id="foo_bar"/>
++ <state id="1"/>
++ <state id="_"/>
++ </scxml>