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georgepm / ckanext-sparql

SPARQL Interface for Ckan
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CKAN Sparql Interface Extension

Note: The ckanext-sparql extension was tested using Virtuoso sparql instances such as http://semantic.ckan.net/sparql.

I will try to make it work for other type of sparql instances ;)

Description

This is a simple extension, but may be useful for someone that wants to include a Sparql Interface Editor in their CKAN instances. The idea is based on the Sparql Editor of the LODUM project from the University of Munsters Open Data initiative (http://data.uni-muenster.de/php/sparql/).

Requeriments

The extension use:

May be extended to use SPARQLWrapper (http://sparql-wrapper.sourceforge.net/) library - SPARQL Endpoint interface to Python

Installation

::

$ cd /usr/lib/ckan/default/src
$ git clone https://github.com/georgepm/ckanext-sparql.git
$ cd ckanext-sparql/
$ sudo python setup.py develop

Add it in your configuration file: ::

$ vim /etc/ckan/default/production.ini

Go the plugins line and add the sparql_interface plugin :: ckan.plugins = sparql_interface ..... (other plugins...)

Reload Apache: ::

$ sudo service apache2 reload

USE

Go to: :: http://[Custom URL]/sparql

Querys work in: :: http://[Custom URL]/query?query=

To send code through http to the sparql interface: :: http://[Custom URL]/sparql?view_code=

CONFIGURATION

In your ckan.ini file set 

    ckanext.sparql.endpoint_url = <your default endpoint url>    (defaults to http://dbpedia.org/sparql)
    ckanext.sparql.hide_endpoint_url = (true | false)    (defaults to false)

Notes

To configure your own custom query 

    Line 54, After
    <textarea id="sparql_code" name="sparql_code"  resize="both">
    Here replace the query
    ...
    </textarea>

Changelog

Example

ToDos