Knowledge Discovery 25.4
Knowledge Discovery Expert

# Standard Connector Fields

This section describes the standard fields that Knowledge Discovery Connectors and CFS add to all your documents.

## Connector Fields

Field | Description
--- | ---
`DREREFERENCE` | A reference for the document. This is the standard Content component reference field, which is used for deduplication.
`AUTN_IDENTIFIER` | An identifier that allows the connector to go back and extract the document again, for example when doing a collect or view.
`DocTrackingId` | An identifier used for document tracking functionality. For details, refer to the Connector documentation.

## CFS Fields

Field | Description
--- | ---
`VersionNumber` | The version number of CFS that was used to import the document.
`KeyviewVersion` | The version number of File Content Extraction that was used to import the document.
`InfoFlag` | A File Content Extraction Flag that describes the file type (External, Embedded, and so on).
`ImportVersion` | The version of the CFS executable file.
`ImportOriginalEncoding` | The detected encoding of the document.
`ImportMagicExtension` | The file extension of the detected document type.
`FAMILYSORT` | A field used to track families (that is, containers) of documents. It contains a hash unique to the family, with indices on the end describing the depth and number of attachments.
`DREROOTFAMILYREFERENCE_ID` | A unique hash for the family of documents.
`DREROOTFAMILYREFERENCE` | The parent document for the family of documents.
`DREORIGINALNAME` | The original name passed to CFS for the file. This is the full path for extracted subfiles.
`DREFILENAME` | The file name of the original document.
`DocumentAttributes` | The File Content Extraction document attributes.
`DocumentClass` | The File Content Extraction document class.
`DocumentSize` | The size of the document.
`DocumentType` | A number that represents the program that created the file format.
`DRECHILDCOUNT` | The number of subfiles that the document has.
`UUID` | A unique identifier for the document.
`DREDBNAME` | The name of the Content database that the document must be indexed to.

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery 25.4

Topic Title: Standard Connector Fields