<document source="index">
    <section ids="heading" names="heading">
        <title>
            Heading
        <container classes="sd-tab-set class-set" design_component="tab-set" is_div="True">
            <sd_tab_input checked="True" id="sd-tab-item-0" set_id="sd-tab-set-0" type="radio">
            <sd_tab_label classes="sd-tab-label class-label" ids="target" input_id="sd-tab-item-0">
                <strong>
                    Label
            <container classes="sd-tab-content class-content" design_component="tab-content" is_div="True">
                <paragraph>
                    Content
        <paragraph>
            <reference internal="True" refid="target">
                <inline classes="std std-ref">
                    Label
            , 
            <reference internal="True" refid="target">
                <inline classes="std std-ref">
                    text
