User Portlet User Portlet

Thank you, Jayanta. I appreciate the example. I'm still learning what I can do without customization, but when I'm finally building something, I may also want to customize.
I clearly phrased my question in the wrong order. I should have stated my problem first. I don't care about the planets dataset, per se, I care about a dataset of my own that has a similar hierarchical structure. My dataset will have thousands to...