wp-sparql

A wordpress plug-in for querying data from a SPARQL endpoint and present results on WP http://wordpress.org/.

Description

wpsparql is a wordpress plug-in that exposes a series of functionalities to bring content exposed by an sparql endpoint to Wordpress' UI.

What is sparql?

SPARQL (pronounced "sparkle") is an RDF query language, that is, a semantic query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format. SPARQL allows for a query to consist of triple patterns, conjunctions, disjunctions, and optional patterns.

What is a sparql endpoint?

SPARQL endpoints are services that accept SPARQL queries and return results.

This plugin is based on wpckan

This plug-in is based on http://github.com/OpenDevelopmentMekong/wpckan/, a wordpress plug-in exposing functionality to pull and present data exposed by a CKAN instance. More about CKAN on http://ckan.org/.

Features

Feature 1: Query SPARQL endpoint

wpsparql exposes the shortcode [wpsparql_query_endpoint query="QUERY"] which can be used to generate a query and present the results returned by the endpoint.

The shortcode has following parameters:

• query: (Mandatory) Term to query the database.

Examples:

[wpsparql_query_endpoint query="SELECT * WHERE { ?person a foaf:Person . ?person foaf:name ?name } LIMIT 1"]

<table class="wpsparql_result_list">
  <tr>
    <th>person</th>
    <th>name</th>
  </tr>
  <tr>
    <td>some_url</td>
    <td>some_name</td>
  </tr>
</table>

Widget

This feature also exposes a widget for integrating the results of queries easily into Wordpress sidebars. Just add the WPSPARQL query endpoint widget available under Appearance > Widgets to any widget area and configure the query you want to execute.

Installation

1. Either download the files as zip or clone git clone https://github.com/OpenDevelopmentMekong/wpsparql.git into the Wordpress plug-ins folder.
2. Install dependencies with composer (http://getcomposer.org) composer install
3. Activate the plugin through the 'Plugins' menu in WordPress

Configuration

1. Go to plug-in settings
2. Specify the URl of the sparql endpoint
3. Add the namespaces you want to support in your queries.
4. Save settings

Development

1. Install composer http://getcomposer.org/
2. Edit composer.json for adding/modifying dependencies versions
3. Install dependencies composer install

Requirements

• PHP 5 >= 5.2.0
• PHP Curl extension (in ubuntu sudo apt-get install php5-curl)

Uses

• https://github.com/byjg/PHP-SPARQL-Lib.git

Is used on

• http://www.suelourbano.org/bibliotecas/
• https://opendevelopmentmekong.net/topics/land

Copyright and License

This material is copyright (c) 2014-2015 East-West Management Institute, Inc. (EWMI).

It is open and licensed under the GNU Lesser General Public License (LGPL) v3.0 whose full text may be found at:

http://www.fsf.org/licensing/licenses/lgpl-3.0.html