Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Granite Data Services (also known as GraniteDS or GDS) is an open source (LGPL) alternative to Adobe LiveCycle Data Services with a special emphasis on integrating with J2EE technologies, including well known Java EE persistence systems (such as EJB3/Hibernate, with full lazy loading support).GDS also comes with an ActionScript3 code generator (Gas3), which greatly accelerates Flex application development. GDS, together with the Flex Builder IDE, or the free Flex SDK, provides developers with a complete and powerful framework for Flex application development and deployment.