From 63f9271555aa39fb3fcc7cded124c668971c0749 Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Thu, 6 Jan 2022 12:31:03 +0100
Subject: README: add a listing of the formats supported

---
 README | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/README b/README
index bdfbc1f..58ece7d 100644
--- a/README
+++ b/README
@@ -133,6 +133,22 @@ Optional run-time dependencies for sfeed_curses
   See the ENVIRONMENT VARIABLES section in the man page to change it.
 
 
+Formats supported
+-----------------
+
+sfeed supports a subset of XML 1.0 and a subset of:
+
+- Atom 1.0 (RFC 4287): https://datatracker.ietf.org/doc/html/rfc4287
+- Atom 0.3 (draft, historic).
+- RSS 0.91+.
+- RDF (when used with RSS).
+- MediaRSS extensions (media:).
+- Dublin Core extensions (dc:).
+
+Other formats like JSONfeed, twtxt or certain RSS/Atom extensions can be
+supported by converting them to RSS/Atom or to the sfeed(5) format directly.
+
+
 OS tested
 ---------
 
-- 
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