# Create Boost Rules

Boost rules allow you to add FieldText to queries to IDOL Server. For example, if a user searches for televisions, you can add FieldText to the query that boosts results for a particular brand of television.

The table shows all the fields that you must include in the IDX file for boost rules.

NOTE: You must add any fields that are referenced in the FieldText expressions to the document as empty fields.

Required IDX fields for boost rules

Field | Description | Content type or value
--- | --- | ---
`#DREREFERENCE` | The reference for the rule. | String
`#DRETITLE` | The title of the rule. | String
`QMSTYPE` | The type of the QMS rule. | `7`
`QMSAGENTBOOL` | The AgentBoolean expression used to match the original query text. | Boolean matching expression. Set this field to `*` to match all query text.
`DATABASERESTRICTION` | (Optional) The Content databases that this rule matches. If you include this field, QMS applies the boost rule only if the original query includes a `DatabaseMatch` parameter with at least one database that matches the `DATABASERESTRICTION`. QMS applies this field only when the original query includes the `DatabaseMatch` and `SynonymDatabaseMatch` action parameters. | String
`SYNONYMDATABASEMATCH` | Set a value for this field to use database matches in this rule. If this field is empty or missing, QMS does not apply the `DATABASERESTRICTION` for this rule. |
`QMSFIELDTEXT` | The FieldText rules to match against. | FieldText expression
`Referenced Fields` | All fields that the `QMSFIELDTEXT` field references must be present in the rule as a field with blank content. | Empty field
`CONCEPT` | FieldText to append. | FieldText expression
`AlwaysMatchType field` | An `AlwaysMatchType` field to match the rule. | Any non-empty value of anything other than 0

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