<viz:dataset>
<viz.data:FlattenedDatasetdata="{/milk}">
<viz.data:dimensions>
<viz.data:DimensionDefinitionname="Store Name"
value="{Store Name}"/>
<viz.data:DimensionDefinitionname="Dimension2"
value="{Dimension2}"/>
<viz.data:DimensionDefinitionname="Dimension3"
value="{Dimension3}"/>
</viz.data:dimensions>
<viz.data:measures>
<viz.data:MeasureDefinitionname="Revenue"
value="{Revenue}"/>
<viz.data:MeasureDefinitionname="Cost"
value="{Cost}"/>
</viz.data:measures>
</viz.data:FlattenedDataset>
</viz:dataset>
<viz:feeds>
<viz.feeds:FeedItemid='valueAxisFeed'uid="valueAxis"type="Measure"
values="Revenue"/>
<viz.feeds:FeedItemid='valueAxisFeed'uid="valueAxis2"type="Measure"
values="Cost"/>
<viz.feeds:FeedItemuid="categoryAxis"type="Dimension"
values="Store Name, Dimension2, Dimension3"/>
</viz:feeds>
Taking code from the Explore sample page and in order to plot a info/dual_line chart, the above could be the definition for flattenedDataset and feeding. You could try feed the measures as valueAxis2 and these measures will be plotted against the 2nd valueAxis.