---
title: "rel=\"describedby\": glossary: Agent Ready HTML"
description: "rel=\"describedby\" defined: A link relation that points from a page to the llms.txt file covering it. Added in llms.txt v2. A dated, sourced example follows."
canonical: https://agentreadyhtml.com/glossary/rel-describedby/
site: "Agent Ready HTML"
last_updated: 2026-11-04
section: "Glossary"
---

# rel="describedby": glossary: Agent Ready HTML

> rel="describedby" defined: A link relation that points from a page to the llms.txt file covering it. Added in llms.txt v2. A dated, sourced example follows.

Source: https://agentreadyhtml.com/glossary/rel-describedby/
Site: Agent Ready HTML
Last reviewed: 2026-11-04

# rel="describedby"

In short

A link relation that points from a page to the llms.txt file covering it. Added in llms.txt v2. Example: The v2 changes page names rel="describedby" for the covering llms.txt. Related terms: Rendered HTML, rel="alternate" type="text/markdown". Rendered HTML: The DOM after a browser has run the page scripts. A human and a JavaScript-running agent see it; a plain-fetch client does not.

## Source of the example

The example in the summary above is from [llmstxt.org](https://llmstxt.org/changes.html), read 4 November 2026.

## Where it shows up on this site

-   [Method](https://agentreadyhtml.com/method/)

## Neighbouring terms

-   [Rendered HTML](https://agentreadyhtml.com/glossary/rendered-html/): The DOM after a browser has run the page scripts.
-   [rel="alternate" type="text/markdown"](https://agentreadyhtml.com/glossary/rel-alternate-markdown/): A link relation in HTML or an HTTP Link header that points from a page to its markdown version.

## Sources

1.  [llmstxt.org](https://llmstxt.org/changes.html) https://llmstxt.org/changes.html, read 4 November 2026

Last reviewed 4 November 2026

Edition

Crawl

2026-11-04

Page updated

2026-11-04

Method

How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).