Steps

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Steps are components that execute one specific task. You use them by chaining them into pipelines. See for example "How to Create a Pipeline in Rainbow" to see how steps can be used. Rainbow also comes with several pre-defined pipelines using some of these steps.

The Okapi Framework comes with several ready-to-use steps:

Legend:

RD->RD = the step takes raw document and sends raw document
RD->FE = the step takes raw document and sends filter events
FE->FE = the step takes filter events and sends filter events
FE->RD = the step takes filter events and sends raw document
FE->RD/FE = the step takes filter events and sends either raw document or filter events