The MAP Step
The MAP step lets you adjust the contents of the pipeline at any point in a flow service. When you build a MAP step, you can:
Prepare the pipeline for use by a subsequent step in the flow service by linking, adding, and dropping variables in the pipeline.
Clean up the pipeline after a preceding step by removing fields that the step added but are not needed by subsequent steps.
Move variables or assign values to variables in the pipeline.
Initialize the input values for a flow service.
Invoke several services (transformers) in a single step.
Map documents from one format to another. For example, you can map a document in an XML format to an ebXML format or a proprietary format.
Tip: The MAP step is especially useful for hard coding an initial set of input values in a flow service. To use it in this way, insert the MAP step at the beginning of your flow, and then use the Set Value modifier to assign values to the appropriate variables in Pipeline Out.
For more information about the MAP step, see
Mapping Data in Flow Services.