<construction xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xml/intergeo.xsd">
	<elements>
		<point id="P">
			<homogeneous_coordinates>
				<double>0</double>
				<double>0</double>
				<double>1</double>
			</homogeneous_coordinates>
		</point>
	</elements>
	<constraints>
		<free_point>
			<point out="true">P</point> 
		</free_point>
	</constraints>
</construction>
