Help with schema

[Guest GLP]

I want to build a schema that will generate the xml output like this:

<DgnData>  <ElementTemplates>    <NodeData name="New Template Group" allowChildren="true">      <NodeData name="New Template" allowChildren="false">        <ECXAttrData><Ustn_ElementParams xmlns="Ustn_ElementParams.01.00">    <PatternScales>        <PatternScale>            <Value>1</Value>        </PatternScale>    </PatternScales></Ustn_ElementParams></ECXAttrData></NodeData></NodeData></ElementTemplates></DgnData>

can anyone give me some pointers on how to do this?Thanks,GLP