This comment appears in some Atom feeds from Facebook:

<!-- SUDA was here. -->

What does it mean?

  • If it's only some feeds, is there anything that the feeds have in common or what's different about these feeds to the ones that don't have this comment?
    – ChrisF
    Commented Jul 6, 2010 at 14:26
  • I think I'm only looking at feeds of Walls (possibly other Pages). All of them seem to have it. Here's a Lord of the Rings example: facebook.com/feeds/…
    – Liam
    Commented Jul 6, 2010 at 15:09

2 Answers 2


Disclaimer: This is speculation because I can't find a confirmation, but here goes...

Just based on a couple of things, I'd say it's a marker entry that some kind of cataloging process internal to Facebook puts in.

  • From Wikipedia:

The Suda or Souda (Greek: Σοῦδα) is a massive 10th century Byzantine encyclopedia of the ancient Mediterranean world...

  • All the sample entries that I can find use an address on the subnet which is a private network. If it is a marker entry and the IP is the address of the system entering in the marker then it's internal to Facebook as it's a private IP.

Well, there are a few possibilities.

  1. SUDA is the name of the server hosting the content
  2. It's an Easter Egg left in by a programmer.
  3. It's the name of the program that pulls the data.

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