In this article we will be building a Flex application for a Data Management service destination in the samples application called lcds-samples bundled with LiveCycle Data Services ES2. Set the item-class property of the Data Management service destination to the name of the object type which the assembler is expecting. All the sample destinations in LCDS 3 have this property set. Sample destination used in this article has item-class property set to flex. Product class as shown below. We have everything ready to develop a Flex application for data management service destinations using Flash Builder 4.