Presentation given during DownScale2013. ERS is a Linked Data publication platform that is offline by default and fully decentralised

1. THE ENTITY REGISTRY SYSTEM (ERS)
DownScale2013
Geneva, 19 September 2013
Christophe Guéret(@cgueret)
https://github.com/ers-devs

2. ARCHITECTURAL CHALLENGE
Collaborate onashared knowledge base
Iconscredithttp://www.iconeden.com/icon/milky-a-free-vector-iconset.html

3. USE THE CLOUD !
Big server +reliable network +light interfaces

4. BUT IT DOES NOT ALWAYS WORK ...
5B people do not have reliable Internet access
Big servers are not widely accessible either
Applicationspecific ->beware of data-silos
No P2Pdialogue, evenfor P2Pactivities
Transfer ownership of data
Smart phones are anexception, not anorm
So we need something else....

5. INTRODUCING ERS
Fully decentralised Linked Datapublicationplatform
Lets users collaboratively describe and link entities
Works under any kind of connectivity context
Tracks back individualedits back to their authors

6. BASIC COMPONENT: CONTRIBUTORS
Edit the content of the dataspace
Every contributor hosts its owndata
Contributors canshare datawiththeir peers

7. BASIC COMPONENT: BRIDGES
Increase connectivity
Canonly cache content fromContributors
Fullcopy of cache among bridges

8. BASIC COMPONENT: GLOBAL SERVER
Aggregates the content fromthe Bridges
Exposes the knowledge base to the outside world
Needs to scale up

9. THE TESTS SO FAR ...

10. SUGAR ACTIVITY TO SEND MESSAGES

11. USE-CASE 1 : SOCIAL NETWORKING
Contributors:someone's laptop, contribute one profile
Bridges:coffee-room device, keep track of visitors
Global server:server providing an overview of the contacts
=> Everyone visiting a universitycan connectwith those who
came before and those who are there
=> Automatic, gossip-like, update of profiles
=> Tune bridges connections based on shared interests
=> LinkedIn like endorsementbyresource description

12. USE-CASE 2 : MARKET PLACE
Contributors:farmer selling point, announces prices
Bridges:Sneakernet(people/truck/...), makes the info move
Global server:crowd-sourcing for governments
=> Verypervasive wayto communicate marketprices as
structured data and do crowd sourcing
=> Adjustbridges to connectto anyother bridges

13. TAKE HOME MESSAGE
ERS infew words :
Fully decentralised Linked Data publication platform
Worksunder any kind of connectivity context
Tracksback individual editsback to their authors
Simpleand versatile
Open Source
Low resourcedemanding
https://github.com/ers-devs
... and open for contributionsso don'thesitateto fork it!