Defining Custom Transformations Defining Custom Transformations A custom transformation is a subclass of Ens.DataTransformOpens in a new tab that specifies: The name of the input (source) message class The name of the output (target) message class A series of operations that assign values to the properties of the output object Each assignment operation consists of a call to the Ens.DataTransformOpens in a new tab class method Transform(). The argument is a simple expression that is evaluated to provide the value for one of the properties in the output class. The expression can contain: Literal values Any property in the general-purpose execution context variable called context Properties on the source object Functions and operators from the expression language Calls to methods provided by InterSystems IRIS® Calls to user-provided methods
