Content Component 26.2
Content Component Help

# KillDuplicates

This parameter determines how the Content component handles duplicate documents. It allows you to prevent the same document or document content from being stored in Content more than once.

Use one of the following options:

`NONE` | Allows duplicate documents in the Content index. Content does not replace or delete documents.
`REFERENCE` | Replaces an existing document with the new document if the documen tot index has the same value in its `DREREFERENCE` field.
`REFERENCEMATCHN` | Replaces the existing document with the new document if the content of the document is more than `N` percent similar to the existing document. Content determines the similarity by comparing the content of the SourceType fields in the document, or the Index fields if no SourceType fields are configured. NOTE: This method can deduplicate only documents that are already synced in the Content component index. It cannot deduplicate similar documents in the same index job.
`FieldName` | Replaces the existing document with the new document if the document to index contains a ReferenceType field named `FieldName` that has the same content as the `FieldName` field in the existing document. You can specify multiple ReferenceType fields in this option, separated by a plus symbol (+) or a space. In this case, Content deletes documents that contain any of the specified fields with identical content. You must percent-encode any punctuation characters in the field name. NOTE: You identify fields as ReferenceType fields by using field processes in the Content component configuration file. If you list multiple fields in the same PropertyFieldCSVs parameter where you list the `FieldName` for deduplication, Content uses all the fields to eliminate duplicate documents. If you want to define multiple ReferenceType fields, but do not want to use all fields for duplicate elimination, set up multiple field processes. See Configure a Field Process.
`ReferenceField,GREATER:VersionField` | Replaces the existing document with the new document if the document to index contains a ReferenceType field named `ReferenceField` that has the same content as the `ReferenceField` in the existing document, and if the `VersionField` in the document to index has a higher value than the `VersionField` in the existing document. For XML documents, you must fully qualify the path of the XML field that you want to use as the version field (you cannot use wildcard values). `VersionField` must contain a positive integer value, but you do not need to configure it as a numeric field. If only one of the incoming and current documents has a valid value in the `VersionField`, Content keeps the version with a valid `VersionField`. When both documents have the same `VersionField`, Content keeps the existing document. NOTE: When you index IDX documents, for the version comparison to work correctly, the value in the field that you use as the `VersionField` must be listed in quotation marks (`""`). That is, the field must have the following format in the IDX:
    #DREFIELD MyField="N"
Content treats existing documents with a missing or non-numeric value in the `VersionField` as having a version number of negative infinity. It treats a new document with a missing or non-numeric value in the `VersionField` as having a version number of 0.

You can postfix any of these options with `=2`, to apply the `KillDuplicates` process to all Content databases (rather than only to the database into which the current IDX or XML file is being indexed).

You can override `KillDuplicates` for individual DREADD or DREADDDATA index actions by using the KillDuplicates index action parameter.

Type: | String
Default: | `REFERENCE`
Required: | No
Configuration Section: | Server
Example: | `KillDuplicates=REFERENCE` In this example, if the document being indexed has the same `DREREFERENCE` as a document that already exists in Content, Content deletes the existing document and replaces it with the new document.
See Also: | KillDuplicatesChecksumField

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Version 26.2 | Last updated April 2026

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Product: Knowledge Discovery Content Component 26.2

Topic Title: KillDuplicates