---
title: Reference
slug: '3381'
canonical_url: https://docs.coveo.com/en/3381/
collection: index-content
source_format: adoc
---
# Reference
The articles in this section provide reference documentation for indexing content in a Coveo organization.

- [Index self-optimization process](https://docs.coveo.com/en/1535/)
- [Source item types](https://docs.coveo.com/en/1965/)
- [Supported file formats](https://docs.coveo.com/en/1689/)
- [Supported languages](https://docs.coveo.com/en/1956/)
- [IPs to allowlist](https://docs.coveo.com/en/1831/)
- [Multi-index organizations](https://docs.coveo.com/en/2877/)
- [Crawling speed](https://docs.coveo.com/en/2078/)