mapnik/tests/visual_tests/shieldsymbolizer-1.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map>
<Map background-color="green" srs="+proj=latlong +datum=WGS84">

    <Layer name="layer" srs="+proj=latlong +datum=WGS84">
        <StyleName>My Style</StyleName>
        <Datasource>
            <Parameter name="type">shape</Parameter>
            <Parameter name="file">points.shp</Parameter>
        </Datasource>
    </Layer>

    <Style name="My Style">
        <Rule>
            <Filter>[nr] = '1'</Filter>
            <ShieldSymbolizer face-name="DejaVu Sans Book" size="16" placement="point" file="../data/images/crosshair16x16.png">'X'</ShieldSymbolizer>
        </Rule>
        <Rule>
            <Filter>[nr] = '3'</Filter>
            <ShieldSymbolizer face-name="DejaVu Sans Book" size="16" placement="point" file="../data/svg/crosshair16x16.svg">'X'</ShieldSymbolizer>
        </Rule>
        <Rule>
            <Filter>[nr] = '5'</Filter>
            <ShieldSymbolizer face-name="DejaVu Sans Book" size="16" placement="point" fill="red" file="../data/images/checker.jpg" allow-overlap="true">'X'</ShieldSymbolizer>
        </Rule>
        <Rule>
            <Filter>[nr] = '7'</Filter>
            <ShieldSymbolizer face-name="DejaVu Sans Book" size="16" placement="point" file="../data/svg/rect.svg" allow-overlap="true">'X'</ShieldSymbolizer>
        </Rule>
        <Rule>
            <Filter>[nr] = '9'</Filter>
            <ShieldSymbolizer face-name="DejaVu Sans Book" size="16" placement="point" file="../data/images/crosshair16x16.png">'ABC'</ShieldSymbolizer>
        </Rule>
        <Rule>
            <PointSymbolizer allow-overlap="true" file="../data/raster/white-alpha.png"/>
        </Rule>
</Style>

</Map>