Creating Global View Classes Each global view extension is an independent Flex or HTML element that must communicate with the vSphere environment to retrieve data, or send commands, that the view requires. The vSphere Web Client SDK includes an MVC framework and a Flex library that you can use when creating global view Flex classes. Both Flex and HTML classes can use the Data Access Manager library to retrieve data from the vSphere environment and to send commands to the virtual infrastructure. You can create a global view class using any pattern or framework, but using the vSphere Web Client SDK MVC framework and Data Access Manager is a best practice for Flex classes. See Architecting Data Views.