Flex 4 and LiveCycle Data Service 3: Data Models, Debugging and Design Patterns is a two-day comprehensive introduction to using LiveCycle Data Services 3 with the Adobe [Apache] Flex 4.x framework. Late in 2011, Adobe donated the Adobe Flex SDK to the Apache Foundation. It is currently under incubation as Apache Flex. Now, the SDK is truly open source with development driven by community members in a meritocracy. The official Adobe Flex courseware is used in this course because the language has not changed significantly.