Features/Semantic Web

Comments and Explanations:

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Summary

Make use of Semantic Web technologies (for instance RDF, SPARQL) to enhance data management in Sugar.

Owner

This should link to your home wiki page so we know who you are

• Name: Your Name

Include you email address that you can be reached should people want to contact you about helping with your feature, status is requested, or technical issues need to be resolved

• Email: <your email address so we can contact you, invite you to meetings, etc.>

Current status

• Targeted release: (SUGAR_VERSION)
• Last updated: (DATE)
• Percentage of completion: XX%

Detailed Description

Expand on the summary, if appropriate. A couple of sentences suffices to explain the goal, but the more details you can provide the better.

Benefit to Sugar

What is the benefit to the platform? If this is a major capability update, what has changed? If this is a new feature, what capabilities does it bring? Why will Sugar become a better platform or project because of this feature?

Make sure to note here as well if this feature has been requested by a specific deployment, or if it has emerged from a bug report.

Scope

What work do the developers have to accomplish to complete the feature in time for release? Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?

UI Design

Does the feature have a direct impact on the work flow, or does it need a UI? Link here mockups, or add detailed descriptions.

How To Test

It is possible to test SemanticXO on both an XO-1 or a desktop PC. However, it is recommended to use an XO-1 are the installation is easier on these and they are used as a primary target for all the development.

On an XO-1 running the software 12.1.0

• Go to http://git.sugarlabs.org/semanticxo/main/trees/master/patch_my_xo

• Put the files "setup.sh" and "semanticxo.tar.gz" somewhere on the XO

• Login as root, set setup.sh to be executable and type "./setup.sh setup". This will install the API of SemanticXO, the triple store and two demo activities

• Reboot

On a desktop PC

This is a step by step intruction guide to test the triple store based Journal backend. It assumes that all the packages for sugar are available and the sugar-emulator is running.

• Download and install RedStore

Follow the instructions on http://www.aelius.com/njh/redstore/ to download and install RedStore on the test machine. It should also be possible to use other triple stores such as Virtuoso or OWLIM as long as a SPARQL 1.1 compliant service is accessible on the port 8080.

• Install the dependencies for SemanticXO
  • RDFLib http://code.google.com/p/rdflib/
  • SPARQLWrapper http://sparql-wrapper.sourceforge.net/

• Download and install the code from SemanticXO

Clone the repository:

 git clone git://git.sugarlabs.org/semanticxo/main.git semanticxo

Edit line 4 and 5 of datastore/bin/datastore-service to make it fit the location of the directory where you clone the code (by default ~/Code/SemanticXO) Locate the datastore-service startup script from the normal datastore

 type datastore-service

Replace that daemon with datastore/bin/datastore-service

• Start redstore in debug mode, so that you will see the queries being executed ;-)

 redstore -v

• Start the sugar emulator

 sugar-emulator

• Play around with Sugar, creating and updating entries in the Journal

• With an explorer, within the emulator or outside, go to http://localhost:8080/ to see the content of the triple store. There should be one named graph per Journal entry

User Experience

If this feature is noticeable by its target audience, how will their experiences change as a result? Describe what they will see or notice.

Dependencies

What other packages (RPMs) depend on this package? Are there changes outside the developers' control on which completion of this feature depends? In other words, does your feature depend on completion of another feature owned by someone else or that you would need to coordinate, which might cause you to be unable to finish on time? Other upstream projects like Python?

Contingency Plan

If you cannot complete your feature by the final development freeze, what is the backup plan? This might be as simple as "None necessary, revert to previous release behaviour." Or it might not. If your feature is not completed in time, we want to assure others that other parts of Sugar will not be in jeopardy.

Documentation

Is there upstream documentation on this feature, or notes you have written yourself? Has this topic been discussed in the mailing list or during a meeting? Link to that material here so other interested developers can get involved.

Release Notes

The Sugar Release Notes inform end-users about what is new in the release. An Example is 0.84/Notes. The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this feature, indicate them here. You can also link to upstream documentation if it satisfies this need. This information forms the basis of the release notes edited by the release team and shipped with the release.

Comments and Discussion

• See discussion tab for this feature