multi-synchronous collaborative semantic wikis
DESCRIPTION
Charbel Rahhal, Hala Skaf-Molli, Pascal Molli, Stéphane Weiss Inria Nancy-Grand Est Nancy University, France Pascal Molli. Multi-synchronous Collaborative Semantic Wikis. Context. Wikis are emblematic of the Web 2.0 It is a collaborative tool : The web is a Read/Write space - PowerPoint PPT PresentationTRANSCRIPT
Multi-synchronous Collaborative Semantic
Wikis
Charbel Rahhal, Hala Skaf-Molli, Pascal Molli, Stéphane Weiss
Inria Nancy-Grand EstNancy University, France
Pascal Molli
Context
Wikis are emblematic of the Web 2.0 It is a collaborative tool :
The web is a Read/Write space Web content is built by users : they produce, but
they also communicate and coordinate through the wiki
It is a social tool : it transforms community of strangers into a
community of collaborators And wikipedia is really amazing...
Semantic wikis
Next, semantic queries can be performed: [[LocatedIn::Europe]][[HasCapital::Paris]] Return the semantic wiki page « France ».
Wikis can be used as knowledge base used by humans and computers...
Problems
As a collaborative editing tool, wikis does not support Multi-synchronous editing
[Dourish95] : Working activities proceed in parallel(multiple streams of activity), during which time the participants are disconnected (divergence occurs); and periodically their individual efforts will be integrated (synchronization) in order to achieve a consistent state and progress the activity of the group".
From a single semantic wiki server to a network of semantic wiki server
A real problem ? Yes especially for semantic wikis...
No transactional change support : Impossible to change several semantic wiki pages atomically
Semantic wikis restructuration requires to change many pages atomically
Intermediate state are visible to users and reasonners !
No process support: How to implement a simple edit/review/publish
process ? Semantic wikis allow to build ontology, quality of
the ontology is dependant of the process used to build this ontology.
How to provide multi-synchronous editing into semantic wikis ?
It is enough to manage semantic pages with Distributed Version Control Systems such as Git, Mercurial, Bazaar...
No : DVCS do not currently support Semantic data
types DVCS only ensure Causality, CSCW researchers demonstrated that Causality,
Convergence and Intentions are required for collaborative editing
as in google wave for example.
Our approach : DSMWDistributed Semantic Media Wiki
Build the multi-synchronous editing feature directly inside an existing semantic wiki (SMW)
Multi-synchronous means: A network a semantic wikis servers (DSMW
nodes) An update is produced on one server It is broadcasted to other servers Others servers receives and re-execute it
The system (all network) is correct if it ensures CCI consistency.
DSMW approach
The broadcast is based on the publish/subscribe model
Server administrators can choose what they publish Server administrators can choose what they
consume Correctness is based on the Logoot algorithm
(ICDCS09). Logoot ensure CCI if broadcast ensures causality.
We proved (in the paper) this is true, with our publish/subscribe mechanism.
DSMW ontology
All elements are represented using Semantic wiki pages : available for requests...
How it works ? 2 pages with [[is in::tutorial]] annotations
[[isin::tutorial]]
Create your feeds
Paches are semantics wikis pages
Now subscription and pull from another DSMW node...
Now you can make your own dataflows
Conclusion
DSMW is an extension of SMW in order to allow multi-synchronous editing
Isolated work and Transactional changes Dataflows
DSMW = SMW + Logoot + publish/subscribe DSMW ensures CCI consistency DSMW stores its data as semantic pages in an
ontology: Allows requests on pages and history of pages,
exports... LGPL : https://dsmw.org (in construction...)
Perspectives
Use the ontology of DSMW to compute new metrics for awareness
Compute existing divergence metrics Compute new ones specific to fully decentralized
work