... Sort, 19 0, 19 2 value, 14 0 – 14 7 , 14 9 , 15 0, 270 virtualization, 249 –253 visual, 244 – 245 , 249 , 2 71 vs. XML, 1 14 11 7 XML, 12 5 12 6, 13 0OOP (object-oriented programming), 40 , 14 0 , 200, 212 Open ... components, 43 2 44 0, 44 4 45 5 custom renderers for, 45 5 45 7 described, 46 , 380 drawing tools, 41 0 41 3 errors, 40 7, 41 7, 43 9 role of, 40 6 41 0 specifying requirements for, 43 7 44 0 unskinnable ... filtering, 12 9 prefix, 22 private functions, 10 0, 263 Problems view, 21, 31 Product class, 14 1 – 14 9 , 14 6 , 218 product nodes, 12 5, 12 8 13 0, 18 1, 18 3, 18 6 product property, 2 24, 240 , 247 , 248 , 282...