LinkedWiki-Mediawiki Extension: Difference between revisions
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** Special:SparqlQuery|SparqlQuery | ** Special:SparqlQuery|SparqlQuery | ||
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==use SPARQL service to save all RDF data of wiki== | |||
https://www.mediawiki.org/wiki/Extension:LinkedWiki/Configuration#Basic_example_with_a_private_database_and_a_simple_RDF_schema | |||
This idea could be interesting to explore, as the Wiki data, could stay stored in the wiki DB, while being "mirror" on a RDF db, through its SPARQL end point. | |||
Will try to do that!! |
Revision as of 15:28, 15 May 2020
- Extension Link: https://www.mediawiki.org/wiki/Extension:LinkedWiki
The LinkedWiki extension lets you reuse Linked Data in your wiki. You can get data from Wikidata or another source directly with a SPARQL query. This extension also provides Lua functions for building your modules so that you can write your data in your RDF database.
installation
You will need to install yarn , I have followed the instructions in https://classic.yarnpkg.com/en/docs/install/#debian-stable which as I have problems with the yarn packed from the Debian Stable apt source.
cd extensions git clone https://github.com/wikimedia/mediawiki-extensions-LinkedWiki.git LinkedWiki cd LinkedWiki
Install composer (locally). I prefer not to have composer installed system wide, so I will install it in the LinkedData extension dir.
curl -sS https://getcomposer.org/installer | php
Run composer install, to install the dependencies
php composer.phar install --no-dev
And finally run yarn install:
yarn install --production=true
Load the extension in LocalSettings.php, by adding to it:
wfLoadExtension( 'LinkedWiki' );
Check the installation by going to Special:Interwiki and Special:LinkedWikiConfig pages, note that the extension does not appear in Special:Version.
If not installed, you are need to install php-curl, :
sudo apt-get install php-curl
And restart the webserver:
sudo systemctl restart apache2
Test
And we can make a Test SPARQL query against Wikidata in Special:SparqlQuery, with the following query, which asks for the European capitals with a population of the more that 1 million, which can be seen embedded in the wiki page LinkedWiki-Sandbox
SELECT DISTINCT ?country ?countryName ?capital ?capitalName ?capitalPop
WHERE
{
?country wdt:P31 wd:Q6256 .
?country rdfs:label ?countryName .
FILTER (LANG(?countryName) = "en").
?country wdt:P30 wd:Q46 .
?country wdt:P36 ?capital .
?capital rdfs:label ?capitalName .
FILTER (LANG(?capitalName) = "en")
?capital wdt:P1082 ?pop .
FILTER ( abs(?pop) > 1000000)
BIND(round(?pop) as ?capitalPop )
}
ORDER BY DESC(?capitalPop)
LIMIT 20
Setting up & Config
As administrator I have to add myself to the group "Data" in Special:UserRights in order to write on the LinkedWiki created namespaces: Data and UserData
I like to add the LinkedWiki important pages to the side bar so i add to Mediawiki:Sidebar
* LinkedWiki ** Special:LinkedWikiConfig|LinkedWikiConfig ** Special:SparqlQuery|SparqlQuery
use SPARQL service to save all RDF data of wiki
This idea could be interesting to explore, as the Wiki data, could stay stored in the wiki DB, while being "mirror" on a RDF db, through its SPARQL end point.
Will try to do that!!