This document summarizes a presentation given at Google MiniBarcamp Lisbon in April 2009. The presentation discussed activity streams, which allow for information sharing across platforms. It covered key features of activity streams like verbs and nouns to describe actions. It also examined different approaches to propagating information, including pull-based using ATOM or a middleman for push-based updates. The presentation concluded by noting real-time push updates with a middleman may be the best method and provided additional resources on activity stream specifications.

1. Google MiniBarcamp Lisbon
April 2009

2. Activity stream

3. Activity stream

4. Activity stream

5. Activity stream

6. Activity stream

7. Features
• Verb
• Noun
• Optional: avatar, user name, context, ...

8. Information flow
• How to make sense?

9. Information flow
• How to propagate?

10. Pull
• Simple
• ATOM based
• Organic growth
• Platform independent
BUT...

11. Full pull
Dramatic growth == huge FAIL!

12. Pull with middleman
Better, but not realtime...

13. Push with middleman
~Realtime, context aware and reversible

14. More info
• http://activitystrea.ms/
• Atom Activity Based Schema
http://martin.atkins.me.uk/specs/activitystreams/activityschema
• Atom Activity Extensions
http://martin.atkins.me.uk/specs/activitystreams/atomactivity

15. Thank you!
Bruno Pedro
bpedro@tarpipe.com
twitter: @bpedro
tarpipe.com/user/bpedro