The document discusses various standards and protocols for distributed social networking, including WebFinger for user discovery, Portable Contacts for accessing user profiles, ActivityStreams for sharing status updates, PubSubHubbub for subscribing to feeds, Salmon for commenting, and OExchange for sharing content across networks. The presentation provides examples and demonstrations of how these standards work together to enable interoperability between decentralized social applications and services.

1. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Distributed Social Networking
Bastian Hofmann
VZnet Netzwerke Ltd.

2. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Agenda
• WebFinger • OExchange
• Well-­‐Known
URIs • XAuth
• Web
Host
Meta
Data • OEmbed
• XRD • SWAT0
• Portable
Contacts
• AcLvity
Strea.ms
• PubSubHubbub
• Salmon

3. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
nikko russano*

4. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
...
you
could
not
send
a
mail
to
another
provider

5. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
...
you
could
not
call
your
friends
at
another
carrier

6. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Back
to
reality

7. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010

8. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Meet
Bill
and
Steve

9. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Bill
want‘s
to
know
more
about
Steve
paurian

10. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
In
the
old
days:
Finger
bhofmann@svz-pcn-107 ~ $ finger bhofmann
Login: bhofmann Name: Bastian Hofmann
Directory: /Users/bhofmann Shell: /bin/bash
On since Di 14 Sep 21:45 (CEST) on console, idle 1:36 (messages
off)
On since Di 14 Sep 23:02 (CEST) on ttys000
No Mail.
No Plan.

11. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Now:
WebFinger
hUp://code.google.com/p/webfinger/

12. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
hCp://example.com/.well-­‐known/
host-­‐meta
<?xml version='1.0' encoding='UTF-8'?>
<XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'
xmlns:hm='http://host-meta.net/xrd/1.0'>
<hm:Host>example.com</hm:Host>
<Link rel='lrdd'
template='http://example.com/describe?uri={uri}'>
<Title>Resource Descriptor</Title>
</Link>
</XRD>
hUp://tools.ieZ.org/html/dra[-­‐nongham-­‐site-­‐meta
hUp://tools.ieZ.org/html/dra[-­‐hammer-­‐hostmeta
hUp://docs.oasis-­‐open.org/xri/xrd/v1.0/xrd-­‐1.0.html

13. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
hCp://example.com/describe?
uri=acct:joe@example.com
<?xml version='1.0' encoding='UTF-8'?>
<XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'>
<Subject>acct:joe@example.com</Subject>
<Alias>http://example.com/profiles/joe</Alias>
<Link rel='http://portablecontacts.net/spec/1.0'
href='http://example.com/api/people/' />
<Link rel='http://webfinger.net/rel/profile-page'
type='text/html'
href='http://example.com/profiles/joe' />
<Link rel='describedby'
type='text/html'
href='http://example.com/profiles/joe' />
<Link rel='http://webfinger.net/rel/avatar'
href='http://example.com/profiles/joe/photo' />
</XRD>

14. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Portable
Contacts
• standardized
access
to
user
data
and
their
relaLons
(Social
Graph)
• simple
to
use
{
"id" : "example.org:34KJDCSKJN2HHF0DW20394",
"displayName" : "Janey",
"name" : {"unstructured" : "Jane Doe"},
"gender" : "female"
}
hUp://portablecontacts.net/

15. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
DEMO

16. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
He
want‘s
to
follow
Steve‘s
status
updates

17. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
AcQvityStrea.ms
• Standard
for
a
stream
of
acLviLes
(Feed)
• Atom
based
hUp://acLvitystrea.ms/

18. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
PubSubHubbub
retrieves
Atom
feed
with
Hub
URL
subscribes
for
feed
acks
Hub
subscripLon
pings
every posts
sth
subscriber
hUp://code.google.com/p/pubsubhubbub/

19. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
DEMO

20. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Now
Bill
menQons
Steve
to
his
pal
have
a
look
at
@steve
stream

21. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
and
what
about
Comments?
new
macs
will
have
IE9
I
would‘ve
chosen
Chrome

22. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Salmon
hUp://www.salmon-­‐protocol.org/

23. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Salmon
hUp://www.salmon-­‐protocol.org/

24. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Salmon
hUp://www.salmon-­‐protocol.org/

25. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
DEMO

26. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Bill
is
now
on
his
favourite
Video
Portal

27. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
He
want‘s
to
share
a
video
with
his
friends
...
but
his
favourite
social
network
has
no
sharing
buUon
at
YouTube

28. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Nascar
Problem

29. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
XAuth
hUp://xauth.org/

30. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
XAuth
at
Provider
• 100%
Client
Technology
Login xauth.org/xauth.js
XAuth.extend({
token: "1",
expire: new Date().getTime()
+ 60*60*24*1000,
extend: ["*"],
});

31. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
XAuth
at
Consumer
•But static server on central domain
needed
Visits xauth.org/xauth.js
XAuth.retrieve({
retrieve: ['xauth.org'],
callback: receiveTokens
});

32. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
OExchange
• Common
API
for
publishing
sth.
into
social
networks
http://www.example.com/share.php?url={URI}&title=
{title for the content}&description={short description
of the content}&ctype=flash&swfurl={SWF URI}&height=
{preferred SWF height}&width={preferred swf width}
&screenshot={screenshot URI}
hUp://www.oexchange.org/

33. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Discovery
over
XRD
<?xml version='1.0' encoding='UTF-8'?>
<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
<Subject>http://www.example.com/linkeater</Subject>
<Property
type="http://www.oexchange.org/spec/0.8/prop/vendor">
Examples Inc.</Property>
<Property
type="http://www.oexchange.org/spec/0.8/prop/title">
A Link-Accepting Service</Property>
<Link
rel= "icon" href="http://www.example.com/favicon.ico"
type="image/vnd.microsoft.icon" />
<Link
rel= "http://www.oexchange.org/spec/0.8/rel/offer"
href="http://www.example.com/linkeater/offer.php"
type="text/html" />
</XRD>

34. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
DEMO

35. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Now
there
is
a
link
in
his
status
update
cool
video:
hUp://www.youtube.com/
watch?v=OFzkTxiwziQ

36. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
OEmbed
• Retrieves
embeddable
content
for
a
given
link
http://www.flickr.com/services/oembed/?url=http%3A//
www.flickr.com/photos/bees/2341623661/
{
"version": "1.0",
"type": "photo",
"width": 240,
"height": 160,
"title": "ZB8T0193",
"url": "http://farm4.static.flickr.com/
3123/2341623661_7c99f48bbf_m.jpg",
"author_name": "Bees",
"author_url": "http://www.flickr.com/photos/bees/",
"provider_name": "Flickr",
"provider_url": "http://www.flickr.com/"
} hUp://oembed.com/

37. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
OEmbed
Discovery
• Discoverable
through
meta
tags
at
original
resource
<link rel="alternate" type="application/json+oembed"
href="http://flickr.com/services/oembed?
url=http%3A//flickr.com/photos/bees/2362225867/&format=json"
title="Bacon Lollys oEmbed Profile" />
<link rel="alternate" type="text/xml+oembed"
href="http://flickr.com/services/oembed?
url=http%3A//flickr.com/photos/bees/2362225867/&format=xml"
title="Bacon Lollys oEmbed Profile" />

38. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
The
embedded
result
cool
video:

39. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
OEmbed
AggregaQon
•embed.ly
•supports 112 services over one
endpoint
•several libraries
•easy implementation
hUp://embed.ly/

40. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
DEMO

41. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Many
standards
available

42. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
But
sQll
much
to
be
done
• Friends
and
Friendships
• Privacy
• Access
Control
• What
is
the
right
idenLfier?
• More
than
one
provider
with
one
E-­‐Mail
Address?
• Wide
adopLon
• Easy
implementaLon

43. VZnet
Netzwerke
Ltd.
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Monday,
December
6,
2010
Many
projects
-­‐
one
common
goal
hUp://federatedsocialweb.net

44. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
And
many
people
working
on
it
hUp://federatedsocialweb.net

45. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Social
Web
Acid
Test
-­‐
Level
0
factoryjoe

46. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
How
far
is
VZnet?
• OpenSocial •Salmon
• OEmbed •XAuth
• OExchange
• XRD
• PortableContacts
• AcLvityStrea.ms
• OpenID
• WebFinger
• PubsubHubbub

47. VZnet
Netzwerke
Ltd.
-­‐
Monday,
December
6,
2010
Thank
you
hUp://twiUer.com/BasLanHofmann
hUp://studivz.net/basLan
hUp://slideshare.net/bashofmann
bhofmann@vz.net
hUp://developer.studivz.net