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	<qualifierRootNode id="Hydrobiologie">
		<qualifierNode id="Taxa">
				...
			<qualifierNode id="Alle taxa">
				<constraints>
					<attributeExists id="Qualifier_TAXA"/>
				</constraints>
			</qualifierNode>
				...
			<qualifierNode id="Macrofyten">
				<qualifierNode id="ALGAE">
					<constraints>
						<attributeTextEquals id="Type" equals="MACFT"/>
						<attributeTextEquals id="Groep" equals="ALGAE"/>
					</constraints>
				</qualifierNode>
				<qualifierNode id="ANGIO">
					<constraints>
						<attributeTextEquals id="Type" equals="MACFT"/>
						<attributeTextEquals id="Groep" equals="ANGIO"/>
					</constraints>
				</qualifierNode>
				<qualifierNode id="SPORO">
					<constraints>
						<attributeTextEquals id="Type" equals="MACFT"/>
						<attributeTextEquals id="Groep" equals="SPORO"/>
					</constraints>
				</qualifierNode>
			</qualifierNode>
				...
	</qualifierRootNode>