<?xml version='1.0' standalone='yes'?>

<extension name="index">

	<tagged-argument extends="(header|address|date)">
		<parameter type="tag" name="index" regex="index" occurrence="optional">
			<parameter type="number" name="field number" />
		</parameter>
	</tagged-argument>

	<tagged-argument extends="(header|address|date)">
		<parameter type="tag" name="last" regex="last" occurrence="optional">
			<requires type="tag" name="index" regex="index" />
		</parameter>
	</tagged-argument>

</extension>