jackallan

This page: http://docs.fusioncharts.com/tutorial-configuring-your-chart-annotations.html shows the use of some macros that I cannot find any documentation for, namely the $dataset macro. Is there somewhere where this is documented? I would like to use annotations on a funnel chart to add additional labels aligned to the center of the segments. Like this:

But what can I do with $dataset ? It is not referred to in the article you linked to. I would like to determine the center of a segment in the funnel. Something like $dataset.0.set.2.centerX. Is this possible?