<document source="index">
    <section ids="heading" names="heading">
        <title>
            Heading
        <container classes="sd-tab-set" design_component="tab-set" is_div="True">
            <container classes="sd-tab-item" design_component="tab-item" is_div="True" selected="False">
                <rubric classes="sd-tab-label">
                    Label1
                <container classes="sd-tab-content" design_component="tab-content" is_div="True">
                    <paragraph>
                        Content 1
            <container classes="sd-tab-item" design_component="tab-item" is_div="True" selected="False">
                <rubric classes="sd-tab-label">
                    Label2
                <container classes="sd-tab-content" design_component="tab-content" is_div="True">
                    <paragraph>
                        Content 2
