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# ReferenceTypeFields

For this option, `ReferenceTypeFields` is a plus-, space-, or comma-separated list of `ReferenceType` fields. If a query produces several results that contain the same value in one or more of the specified `ReferenceType` fields, IDOL Server returns only the most relevant result. If several results have the same relevance, the result with the highest `DocID` returns (unless you enable a `Sort` option that overrides this).

For example:

    http://IDOLhost:port/action=Query&Text=The Moonstone&Combine=DRETITLE

In this example, if several results contain the same value in the `DRETITLE` field, it displays only the result that has the highest relevance to the query text.

When you combine using a `ReferenceType` field, IDOL Server automatically uses all the fields that you list in the configuration file in the same `PropertyFieldCSVs` parameter as this field. To ensure that IDOL Server combines using only the specified field, you must set up an individual field process to identify this field as a `ReferenceType` field.

If you want to use multiple `ReferenceType` fields to combine, you might want to create a process that identifies all these fields as `ReferenceType`.

Related Topics

- Configure a Field Process

For example:

    [SetupReferenceFields]
    Property=ReferenceFields
    PropertyFieldCSVs=*/DREREFERENCE,*/url

    [CombineField1]
    Property=ReferenceFields
    PropertyFieldCSVs=*/DRETITLE

    [CombineField2]
    Property=ReferenceFields
    PropertyFieldCSVs=*/CombineField

In this example, if you set `Combine` to `DREREFERENCE`, IDOL Server combines using the `DREREFERENCE` and `url` fields. If you set `Combine` to `DRETITLE`, it uses only the `DRETITLE` field to combine.

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