# FilterExpression

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> **FilterExpression**: \[`null` | `string`, `"in"` | `"ni"`, `null` | (`null` | `string` | `number` | `boolean`)\[]] | \[`null` | `string`, `"lt"` | `"gt"` | `"le"` | `"ge"` | `"eq"` | `"ne"` | `"cn"` | `"nc"` | `"is"` | `"isnt"`, `null` | `string` | `number` | `boolean`]