2018.1

Steps
In the DataMapper, steps are part of an extraction workflow (see "Data mapping workflow" on
page164). They contain a specific instruction for the DataMapper, for example to extract data,
create a loop, or apply a condition. Some types of steps contain other steps.
Steps are executed sequentially, from top to bottom in an extraction workflow.
Inside a Condition step, some steps may be skipped altogether when they are on a particular
branch, whereas in a Repeat step - a loop - several steps may be repeated a number of times.
The Preprocessor and Postprocessor steps are special in that the first can be used to modify
the incoming data prior to executing the rest of the extraction workflow while the latter can be
used to further process the resulting record set after the entire extraction workflow has been
executed.
Step types
These are the types of steps that can be added to a data mapping workflow:
l "Preprocessor step" below
l "Extract step" on page193
l "Repeat step" on page194
l "Goto step" on page195
l "Condition step" on page196
l "Multiple Conditions step" on page199
l "Action step" on page200
l "Postprocessor step" on page201
Preprocessor step
The Preprocessor step allows the application to modify the incoming data prior to executing the
rest of the extraction workflow through a number of preprocessors. It also lets you define
properties, to be added to each record or to the data as a whole. A unique ID could be created
to be added to each record in the output for integrity checks later on. A time stamp could be
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