To discover data sets, first select a container. The grid will show all of the data
sets in that container. If you would like to only show data sets in a particular
category, click one of the categories along the left side of this page.
To query data within a data set, click the name of the data set in the grid. The
grid also shows the source of the data set and a brief description. To view extended
information about a particular data set (if available), click the "More Information"
link under the data set's description.