# NIST RDS Filter Task Parameters

The parameters in this section customize the `NISTRDSFilter` task.

This task compares the checksums of files against NIST RDS hash sets, to identify any files that originate from operating systems or common application software. The task adds the fields `AUTN_NIST_RDS_LIST`, `AUTN_NO_FILTER`, and `AUTN_NO_EXTRACT` to documents that represent a matching file.

NOTE: Before using this task you must populate a datastore with the NIST RDS hash set(s). For information about how to do this, refer to the CFS Administration Guide.

When you configure the task, use the `Pre` parameter to specify the name of a section in the CFS configuration file that contains the task settings. For example:

    [ImportTasks]
    Pre0=NistRdsFilter:NistRdsFilterSettings

    [NistRdsFilterSettings]
    NistRdsStoreType=BTREE

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