EPX allows you to create custom Web pages, called viewers, that create and display the work items that are passed from activity to activity in a process flow. The Design Console interface provides developers with a mechanism for building their own viewers. As it relates to EPX, Design Console:
executes in the EPX client framework and transparently handles communication with EPX’s Application Server instances
includes a means of constructing well-formed HTML files (called “viewers”), which are accessed by end-users via TaskManager, and which handle the transfer of data between the server and the client