FEP-a5c5: Web Syndication (#363)

Standard for retrieving RSS of any ActivityPub object. E.g: https://codeberg.org/fediverse/fep.rss

* Discussion: https://socialhub.activitypub.rocks/t/4362

Reviewed-on: https://codeberg.org/fediverse/fep/pulls/363
Co-authored-by: AvidSeeker <avidseeker7@protonmail.com>
Co-committed-by: AvidSeeker <avidseeker7@protonmail.com>

fep/a5c5/fep-a5c5.md

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+---
+slug: "a5c5"
+authors: AvidSeeker <avidseeker7@protonmail.com>
+status: DRAFT
+dateReceived: 2024-07-15
+trackingIssue: 'https://codeberg.org/fediverse/fep/issues/364'
+discussionsTo: 'https://socialhub.activitypub.rocks/t/4362'
+title: Web Syndication Methods
+date: 2024-07-15
+---
+
+# FEP-a5c5: Web Syndication Methods
+
+## Summary
+
+This document proposes a standard for web syndication methods across the
+Fediverse by appending `.rss` or `.atom` to object URLs. This will allow users
+to easily subscribe to feeds of timelines, posts, and other objects.
+Additionally, this proposal addresses whether syndication methods should be
+applicable to mirrored profiles across the Fediverse, recommending optional but
+preferred implementation.
+
+## Syndication Methods
+
+### Creating Feeds
+
+To create a syndication feed, servers must append `.rss` or `.atom` to the URL
+of an object. For example:
+
+- For a user timeline: `https://example.org/@user.rss` or `https://example.org/@user.atom`
+- For a post: `https://example.org/posts/12345.rss` or `https://example.org/posts/12345.atom`
+
+### Mirrored Profiles
+
+For mirrored profiles, such as `https://example-mirror.org/@user@example.org`,
+appending `.rss` or `.atom` should be supported, but it is optional. The
+recommendation is to implement this feature to maintain consistency and user
+convenience across different instances.
+
+Example URLs:
+
+- For a mirrored user timeline:
+  `https://example-mirror.org/@user@example.org.rss` or
+  `https://example-mirror.org/@user@example.org.atom`
+
+## Copyright
+
+CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
+
+To the extent possible under law, the authors of this Fediverse Enhancement
+Proposal have waived all copyright and related or neighboring rights to this
+work.