<se:xmldatatable>
    <se:parameters>
        <se:parameter name="resulttype">datatable</se:parameter>
        <se:parameter name="save">data</se:parameter>
        <se:parameter name="xml">
            <se:row>
                <se:col name="key" datatype="string">root</se:col>
            </se:row>
            <se:row>
                <se:col>Science</se:col>
                <se:col name="parent" datatype="string">root</se:col>
            </se:row>
            <se:row>
                <se:col>Music</se:col>
                <se:col>root</se:col>
            </se:row>
            <se:row>
                <se:col>Physics</se:col>
                <se:col>Science</se:col>
            </se:row>
            <se:row>
                <se:col>Chemistry</se:col>
                <se:col>Science</se:col>
            </se:row>
            <se:row>
                <se:col>Astrophysics</se:col>
                <se:col>Physics</se:col>
            </se:row>
            <se:row>
                <se:col>Quantum Chromo Dynamics</se:col>
                <se:col>Physics</se:col>
            </se:row>
            <se:row>
                <se:col>Metal</se:col>
                <se:col>Music</se:col>
            </se:row>
            <se:row>
                <se:col>Rock</se:col>
                <se:col>Music</se:col>
            </se:row>
            <se:row>
                <se:col>Jazz</se:col>
                <se:col>Music</se:col>
            </se:row>
        </se:parameter>
    </se:parameters>
</se:xmldatatable>
<se:viewhierarchy>
    <se:parameters>
        <se:parameter name="inputdata">data</se:parameter>
        <se:parameter name="keyfield">key</se:parameter>
        <se:parameter name="parentfield">parent</se:parameter>
        <se:parameter name="format">
            <se:rowformat>{string.repeat(char.tab(), this.field(level))}{this.field(key)}</se:rowformat>
            <se:rowdelimiter>{char.crlf()}</se:rowdelimiter>
        </se:parameter>
    </se:parameters>
</se:viewhierarchy>

{string.repeat('hi', 5)}