“…Finally, another class of interactive systems can be described as visual builders, and our three systems are members of this class, along with systems such as iVisDesigner [33], iVolver [26], InfoNice [45], Data-Driven Guides [15], DataInk [50], and VisComposer [23]. Though their interfaces tend to be more complicated than those of template-and shelf-based systems, visual builders provide authors with fine control in specifying marks, glyphs, coordinate systems, and layouts.…”