# ExtractMetadata Task Parameters

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

This task extracts metadata from the file associated with a document. It extracts a subset of the metadata obtained by standard KeyView filtering. It is faster than standard KeyView filtering but does not extract the file content.

TIP: CFS automatically extracts metadata. Do not use this task unless you have set the fields `AUTN_NO_FILTER` and `AUTN_NO_EXTRACT` on a document and want to extract basic metadata only.

You can configure the `ExtractMetadata` task as a Pre task.

The task reads configuration parameters from the section of the configuration file that you specify in the `Pre` parameter, for example:

    [ExtractMetadata]
    Pre0=Lua:scripts/nofilter.lua
    Pre1=ExtractMetadata:ExtractMetadataSettings

    [ExtractMetadataSettings]
    FieldnamePrefix=FIELD_
    ReservedFieldnames=Reserved1,Reserved2

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