Utility classes for supporting prefuse data structures, including indexes, iterators, filters, and column projections.

Indexes ({@link prefuse.data.util.Index}) support efficient access to table rows organized by the data values of a particular column.

Filtered Iterators support selecting subsets of data from data tables. This includes optimized queries over table rows (using availabled indexes). Currently all query planning is performed by the {@link prefuse.data.util.FilterIteratorFactory} class.

Column Projections filter out unwanted table columns, controlling what data fields are inherited by a {@link prefuse.data.CascadedTable}.