---
title: Field
slug: '200'
canonical_url: https://docs.coveo.com/en/200/
collection: glossary
source_format: adoc
---
# Field
A {doctitle} is a data container where [sources](https://docs.coveo.com/en/246/) [index](https://docs.coveo.com/en/204/) the [metadata](https://docs.coveo.com/en/218/) they extract from your content.
Each field stores a specific type of information about the content [items](https://docs.coveo.com/en/210/) in your index.
Sources follow [mapping](https://docs.coveo.com/en/217/) rules to populate fields with the metadata they extract.