[Sugar-devel] Call for testing and feedback: alternative Journal implementation

[Christophe Guéret]

Dear all,

A part of the project "SemanticXO" concerns the implementation of an
alternative Journal implementation making use of the triple store backend.
Triple store are data bases optimised to store factual information in the
form of statements linking a subject, a property and a value. This makes
them particularly fit to store key/value metadata, such as the one the
Journal uses. The feature proposal for SemanticXO gives more detailled
about what this is about: http://wiki.sugarlabs.org/go/Features/Semantic_Web

I've just finished removing a couple of bugs and would be interested in
getting a first round of feedback.
The installation procedure is not super convenient but should be manageable
anyway: http://wiki.sugarlabs.org/go/Features/Semantic_Web/Testing

The code is based on two parts:
* a module "common" that allows to store arbitrary data in the triple store
* a module "datastore" which uses "common" to store the data from the
Journal
I'm now working on implementing other usage examples for "common". In the
Journal, the most visible change is the possibility to browse the content
through the SPARQL interface of the triple store. This means it is
possible, and rather easy, to gather statistics about the activities
performed in a class room or do backup of the metadata without having to
interupt any other activity.

Looking forward to your feedback, cheers,
Christophe
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