Page Comparison

	<!-- Create a new data definition that groups the values based on their 'group' value -->
	<data:datadefinition id="test.group">
		<groupdataconnection datadefinition="test.source">
			<parameter name="group"   label="Group"      column="group"/>
			<parameter name="sum"     label="Sum"        column="sum(value)"/>
			<parameter name="avg"     label="Average"    column="avg(value)"/>
			<parameter name="min"     label="Minimum"    column="min(value)"/>
			<parameter name="max"     label="Maximum"    column="max(value)"/>
			<parameter name="count"   label="Count"      column="count(1)"/>
			<group column="group"/>
		</groupdataconnection>
	</data:datadefinition>

	<!-- Create a new data definition that groups the values based on their 'date' value -->
	<data:datadefinition id="test.group">
		<groupdataconnection datadefinition="test.source">
			<parameter name="group"   label="Group"      column="date"/>
			<parameter name="sum"     label="Sum"        column="sum(value)"/>
			<parameter name="avg"     label="Average"    column="avg(value)"/>
			<parameter name="min"     label="Minimum"    column="min(value)"/>
			<parameter name="max"     label="Maximum"    column="max(value)"/>
			<parameter name="count"   label="Count"      column="count(1)"/>
			<group column="date"/>
		</groupdataconnection>
	</data:datadefinition>