> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Query Pipeline Stages

export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => {
  const [isLoaded, setIsLoaded] = useState(false);
  useEffect(() => {
    const timer = setTimeout(() => {
      setIsLoaded(true);
    }, 500);
    return () => clearTimeout(timer);
  }, []);
  return <div className="lw-template-container">
      <Card title={title} icon={icon}>
        {isLoaded && <span dangerouslySetInnerHTML={{
    __html: `<lw-template id="a029c1a9-28be-427e-b0e1-5d918920246a"></lw-template
            >`
  }} />}
        <Link href={linkHref} className="agent-studio-link text-left text-gray-600 gap-2 dark:text-gray-400 text-sm font-medium flex flex-row items-center hover:text-primary dark:hover:text-primary-light group-hover:text-primary group-hover:dark:text-primary-light">Powered by Lucidworks Agent Studio</Link>
      </Card>
    </div>;
};

[localhost link]: http://localhost:3000/docs/4/fusion-ai/reference/query-pipeline-stages/overview

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-ai/reference/query-pipeline-stages/overview

[old doc.lw link]: https://doc.lucidworks.com/fusion-ai/4.2/526

A query pipeline is made up of a series of query stages that process incoming search queries.

<LwTemplate />

A pipeline stage definition associates a unique ID with a set of properties.
These definitions are registered with the Fusion API service and stored in ZooKeeper for re-use across pipelines and search applications.

Fusion includes a number of specialized query stages as well as a JavaScript stage that allows advanced processing via a JavaScript program.

Use the [Query Workbench](/docs/4/fusion-server/concepts/querying/query-workbench) to configure stages in a query pipeline.

See these reference topics for details about each query pipeline stage:

* [Analytics Catalog Query](/docs/4/fusion-ai/reference/query-pipeline-stages/analytics-catalog-query-stage)
* [Boost Documents](/docs/4/fusion-ai/reference/query-pipeline-stages/boost-documents-query-stage)
* [Boost with Signals](/docs/4/fusion-ai/reference/query-pipeline-stages/recommendation-boosting-query-stage)
* [Experiment](/docs/4/fusion-ai/reference/query-pipeline-stages/experiment-query-stage)
* [Machine Learning](/docs/4/fusion-ai/reference/query-pipeline-stages/machine-learning-query-stage)
* [NLP Annotator](/docs/4/fusion-ai/reference/query-pipeline-stages/nlp-annotator-query-stage)
* [Machine Learning (Responses)](/docs/4/fusion-ai/reference/query-pipeline-stages/response-machine-learning-query-stage)
* [Parameterized Boosting](/docs/4/fusion-ai/reference/query-pipeline-stages/advanced-boosting-query-stage)
* [Recommend Items for User](/docs/4/fusion-ai/reference/query-pipeline-stages/recommend-items-for-user-query-stage)
* [Recommend Items for Item](/docs/4/fusion-ai/reference/query-pipeline-stages/recommend-items-for-item-query-stage)
* [Response Document Exclusion](/docs/4/fusion-ai/reference/query-pipeline-stages/response-document-exclusion-query-stage)
* [Response Document Field Redaction](/docs/4/fusion-ai/reference/query-pipeline-stages/result-field-redaction-query-stage)
* [Response Pairwise Swap](/docs/4/fusion-ai/reference/query-pipeline-stages/response-pairwise-swap-query-stage)
* [Response Shuffle](/docs/4/fusion-ai/reference/query-pipeline-stages/response-shuffle-query-stage)
* [Solr MoreLikeThis](/docs/4/fusion-ai/reference/query-pipeline-stages/solr-more-like-this-query-stage)