The beta variation of the fourth version of Flex for Flex advancement has remained in the market for time currently. Its development was a general process unlike others where the company creates the products safely at its office and also one fine day introduces its launch. Throughout the advancement procedure Flex 4 was code named Gumbo. While a lot of the attributes of Flex 3 remain the same there were a few features which saw some modifications. There are 3 primary reasons that namespaces are made use of in Flex, they can be listed as below: 1) Lets Flex developer recognize the language variation of the language being made use of. 1)fx: Declarations are now not permitted to be under the applicationorigin on their own. 2 )There are chances that the fx: Exclusive tag will certainly include addedfeatures to make it simpler to utilize. 3 )fx: Library has been made recyclable. Declarative graphics is another point that changesin Flex 4 which would be used to develop rich web applications making use of Flex development. Both Flash Player 10 as well as Flex 4 will be now able to supply FXG based visual components like bitmaps, masks, gradients, alphas etc. Besides this Flash Driver has many more results that makes utilizing the results simpler. An id selector and also descendant selector have been included to assist programmers add design to the part. Layout is one more section which has seen enhancements with the inclusion of Application tag aimed to display all the 3 formats at once. This would certainly make certain no failures since the flash designer missed out on to consist of a variable.