# Index Mode

In Index Mode, the `TypeAhead` action uses the configured IDOL Server data index to retrieve suggestion values. The action sends the string that you provide in a `TermExpand` action to the index Content component or DAH, and returns the expansions as the suggested values.

You can add the `Stemming`, `Type`, and `Expansion` action parameters from the IDOL `TermExpand` action to your `TypeAhead` action to modify how QMS requests the terms. You can also add the `FieldRestriction` parameter to the `TypeAhead` action to specify the fields that you want the expanded values to come from. For more information, refer to the QMS Reference.

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