<dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression>
<subreportExpression><![CDATA["src/table/jasper/Blank_A4_1.jasper"]]></subreportExpression>
main report code:
<band height="100">
<subreport>
<reportElement x="-20" y="0" width="480" height="100" uuid="65fbc18f-3989-4701-ba4a-da8222d0a54d">
<property name="com.jaspersoft.studio.unit.x" value="pixel"/>
<property name="com.jaspersoft.studio.unit.y" value="pixel"/>
</reportElement>
<subreportParameter name="P_ruleName">
<subreportParameterExpression><![CDATA[$V{Variable_rule}]]></subreportParameterExpression>
</subreportParameter>
<dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression>
<subreportExpression><![CDATA["src/table/jasper/Blank_A4_1.jasper"]]></subreportExpression>
</subreport>
</band>