# Create Whitelist and Blacklist Rules

A whitelist is a list of words that are allowed in queries. QMS removes any words that are not in the whitelist from the query before it sends the query to IDOL Server. If a rule defines a whitelist, it must have a `QMSTYPE` field with the value `5`.

Conversely, a blacklist is a list of words that are not allowed in queries. QMS removes any words on the blacklist from the query before it sends the query to IDOL Server. If a rule defines a blacklist, it must have a `QMSTYPE` field with the value `6`.

The whitelist or blacklist rule must contain a list of words that form the list. The table shows all the fields that you must include in the IDX file for whitelist and blacklist rules.

Required IDX fields for whitelist and blacklist 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. | `5` (whitelist rule) `6` (blacklist rule)
`KEYWORDS` | The set of words that form the list. | Comma-separated list of words. Percent-encode spaces and punctuation in the words.

Related Topics

- Example Blacklist Rule
- Example Whitelist Rule

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