# Section I - Overview

Data provisioning is a core building-block of the DaaS Pattern. It is the implementation of the applications business logic in the data flow of the system.&#x20;

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To assist developers in building out data provisioning microservices more easily, the DaaS SDk provides a `DaaSProcessor` structure which inherits the `DaaSProcessorService` trait:

* keep\_listening
* start\_listening
* stop\_listening
