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                <box>
                    <topPen lineWidth="0.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
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                    <rightPen lineWidth="0.0" lineStyle="Solid" lineColor="#000000"/>
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                <textElement textAlignment="Center" verticalAlignment="Middle">
                    <font fontName="Times New Roman" size="5" pdfFontName="Times-Roman"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{gruppo}]]></textFieldExpression>
            </textField>