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# Chapter 55. Data Quality

Some components are focused on determining and assuring the quality of your data. We call this group of components: Data Quality.

Data Quality serve to perform multiple and heterogeneous tasks.

As Data Quality are heterogeneous group of components, they have no common properties.

We can distinguish each component of the Data Quality group according to the task it performs.

- AddressDoctor 5 validates or fixes address format.

- EmailFilter validates e-mail addresses and sends out the valid ones. Data records with invalid e-mail addresses can be sent out through the optional second output port.

- ProfilerProbe performs statistical analyses of data flowing through the component. It is part of CloverETL Data Quality package (see Product Comparison)

- Validator allows you to specify a set of rules and check the validity of incoming data based on these rules. It is part of CloverETL Data Quality package (see Product Comparison).

##### See also

Chapter 30, Components
Common Properties of Components
Specific Attribute Types

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