> ## 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 Reference

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[localhost link]: http://localhost:3000/docs/5/fusion/reference/config-ref/pipeline-stages/query-stages/overview

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/reference/config-ref/pipeline-stages/query-stages/overview

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/278

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.

The detailed configuration article about each Fusion query pipeline stage is provided in this section.

Configuration details are found for each pipeline stage in this section.
To configure a query pipeline stage, sign in to Fusion and click **Querying > Query Workbench**. Then click **Add a Stage** and select the stage you want to configure. The stages are displayed under these categories:

* **Set Up.** This section displays options that let you configure stages such as Facets, Graph Security Trimming, and Query Fields.
* **Results Relevancy.** This section displays options that let you configure stages such as Block Documents, Boost Documents, Recommend Items for Item, and Recommend Items for User.
* **Fetch Data.** This section displays options that let you configure stages such as Apply Rules, JDBC Lookup, and REST Query.
* **Responses.** This section displays options that let you configure stages such as QnA Result Document Field Sorting, Response Diagnostics, and Response Document Exclusion.
* **Troubleshooting.** This section displays the option that lets you configure the Logging stage.
* **Advanced.** This section displays options that let you configure stages such as Additional Query Parameters, Managed JavaScript, and QnA Filter Stop Words.
* **Custom.** This section displays options that let you configure stages such as Custom Graph Security Trimming and JavaScript.
* **AI.** This section displays options that let you configure stages such as Hybrid Query, LWAI Prediction, and Machine Learning.
* **Other.** This section displays options that let you configure stages such as Experiment Stage, Return Query Parameters, and Text Tagger.

For information about how to configure stages in a query pipeline, see [The Query Workbench](/docs/5/fusion/intro/ui-tour/query-workbench).

For conceptual information, see [Query pipelines](/docs/5/fusion/getting-data-out/query-basics/query-pipelines/query-pipeline-stages).