# Feed formats

Provide a publicly accessible feed in one of the following formats:

- [Atom Syndication Format](https://www.rfc-editor.org/rfc/rfc4287)
- [RSS](https://en.wikipedia.org/wiki/RSS)
- [EDXL-DE 1.0](http://docs.oasis-open.org/emergency/edxl-de/v1.0/EDXL-DE_Spec_v1.0.pdf)

For guidance about how to deliver CAP alerts in a feed and how to set up Atom or
RSS feeds to CAP alerts, see
[CAP example practices: CAP feeds](http://docs.oasis-open.org/emergency-adopt/cap-feeds/v1.0/cap-feeds-v1.0.html).
Include a link in your web feed to your full CAP alert, as shown in
[Atom entry-to-CAP mapping](http://docs.oasis-open.org/emergency-adopt/cap-feeds/v1.0/cn02/cap-feeds-v1.0-cn02.html#_Toc382489977).

> [!IMPORTANT]
> **Important:** Ideal feed size guidelines are around 100 KB or less, to a maximum of 900 KB.