elasticsearch/docs/reference/elasticsearch-plugins/api-extension-plugins.md

mapped_pages
https://www.elastic.co/guide/en/elasticsearch/plugins/current/api.html

API extension plugins [api]

API extension plugins add new functionality to Elasticsearch by adding new APIs or features, usually to do with search or mapping.

Community contributed API extension plugins [_community_contributed_api_extension_plugins]

A number of plugins have been contributed by our community:

• carrot2 Plugin: Results clustering with carrot2 (by Dawid Weiss)
• Elasticsearch Trigram Accelerated Regular Expression Filter: (by Wikimedia Foundation/Nik Everett)
• Elasticsearch Experimental Highlighter: (by Wikimedia Foundation/Nik Everett)
• Entity Resolution Plugin (zentity): Real-time entity resolution with pure Elasticsearch (by Dave Moore)