> ## 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.

# Index 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-server/reference/pipeline-stages/indexing/overview

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

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/229

Index Pipeline stages are used to create and modify [PipelineDocument objects](https://javadoc.lucidworks.com/fusion-pipeline-javadocs/4.2/com/lucidworks/apollo/common/pipeline/PipelineDocument.html). Use the [Index Workbench](/docs/4/fusion-server/concepts/indexing/datasources/index-workbench) to configure stages in a pipeline and preview the results.

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

<LwTemplate />

## Document transformation

* [XML Transformation](/docs/4/fusion-server/reference/pipeline-stages/indexing/xml-transform-index-stage)

## Document filtering and enrichment

* [Detect Language](/docs/4/fusion-server/reference/pipeline-stages/indexing/language-detection-index-stage)
* [Exclude Documents](/docs/4/fusion-server/reference/pipeline-stages/indexing/exclude-documents-index-stage)
* [Format Signals](/docs/4/fusion-server/reference/pipeline-stages/indexing/signal-formatter-index-stage)
* [Include Documents](/docs/4/fusion-server/reference/pipeline-stages/indexing/include-documents-index-stage)
* [JDBC Lookup](/docs/4/fusion-server/reference/pipeline-stages/indexing/jdbc-index-stage)
* [REST Query](/docs/4/fusion-server/reference/pipeline-stages/indexing/indexing-rpc-stage)

## Field transformation

* [Date Parsing](/docs/4/fusion-server/reference/pipeline-stages/indexing/date-parsing-index-stage)
* [Field Mapping](/docs/4/fusion-server/reference/pipeline-stages/indexing/field-mapper-index-stage)
* [Filter Short Fields](/docs/4/fusion-server/reference/pipeline-stages/indexing/short-field-filter-index-stage)
* [Find and Replace](/docs/4/fusion-server/reference/pipeline-stages/indexing/find-replace-index-stage)
* [GeoIP Lookup](/docs/4/fusion-server/reference/pipeline-stages/indexing/geoip-lookup-index-stage)
* [Regex Field Extraction](/docs/4/fusion-server/reference/pipeline-stages/indexing/regular-expression-extractor-index-stage)
* [Regex Field Filter](/docs/4/fusion-server/reference/pipeline-stages/indexing/regular-expression-filter-index-stage)
* [Regex Field Replacement](/docs/4/fusion-server/reference/pipeline-stages/indexing/regular-expression-replacement-index-stage)
* [Resolve Multivalued Fields](/docs/4/fusion-server/reference/pipeline-stages/indexing/multi-value-resolver-index-stage)
* [Solr Dynamic Field Name Mapping](/docs/4/fusion-server/reference/pipeline-stages/indexing/solr-dynamic-field-name-mapping-index-stage)

## Natural language processing

* [Detect Sentences](/docs/4/fusion-server/reference/pipeline-stages/indexing/sentence-detection-index-stage)
* [Gazetteer Lookup Extraction](/docs/4/fusion-server/reference/pipeline-stages/indexing/gazetteer-lookup-extractor-index-stage)
* [OpenNLP NER Extraction](/docs/4/fusion-server/reference/pipeline-stages/indexing/opennlp-ner-extractor-index-stage)
* [Tag Part-of-Speech](/docs/4/fusion-server/reference/pipeline-stages/indexing/part-of-speech-index-stage)

## Indexing

* [Solr Indexer](/docs/4/fusion-server/reference/pipeline-stages/indexing/solr-indexer-stage)
* [Solr Partial Update Indexer](/docs/4/fusion-server/reference/pipeline-stages/indexing/solr-partial-update-indexer-stage)
* [Update Related Document](/docs/4/fusion-server/reference/pipeline-stages/indexing/update-related-document-index-stage)

## Troubleshooting

* [Logging](/docs/4/fusion-server/reference/pipeline-stages/indexing/logging-index-stage)
* [Send PagerDuty Message](/docs/4/fusion-server/reference/pipeline-stages/indexing/pagerduty-index-stage)
* [Send SMTP Email](/docs/4/fusion-server/reference/pipeline-stages/indexing/email-index-stage)
* [Send Slack Message](/docs/4/fusion-server/reference/pipeline-stages/indexing/slack-index-stage)
* [Write Log Message](/docs/4/fusion-server/reference/pipeline-stages/indexing/logging-message-index-stage)

## Advanced

* [Call Pipeline](/docs/4/fusion-server/reference/pipeline-stages/indexing/call-pipeline-index-stage)
* [Exclusion Filter](/docs/4/fusion-server/reference/pipeline-stages/indexing/exclusion-filter-index-stage)
* [Javascript](/docs/4/fusion-server/reference/pipeline-stages/indexing/javascript-index-stage)
* [Machine Learning](/docs/4/fusion-server/reference/pipeline-stages/indexing/machine-learning-index-stage)
* [Managed Javascript](/docs/4/fusion-server/reference/pipeline-stages/indexing/managed-javascript-index-stage)
* [Set Property](/docs/4/fusion-server/reference/pipeline-stages/indexing/set-property-index-stage)