d9bb673b72
Example: http://en.wiki.local.wmftest.net:8080/wiki/Category:Ducks> a mediawiki:Category ; rdfs:label "Ducks" ; mediawiki:isInCategory <http://en.wiki.local.wmftest.net:8080/wiki/Category:Birds> . Bug: T157676 Change-Id: I59b9603581b37af59d17dd6c38247c85aee44911
95 lines
2.9 KiB
PHP
95 lines
2.9 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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*/
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use Wikimedia\Purtle\RdfWriter;
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/**
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* Helper class to produce RDF representation of categories.
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*/
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class CategoriesRdf {
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/**
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* Prefix used for Mediawiki ontology in the dump.
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*/
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const ONTOLOGY_PREFIX = 'mediawiki';
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/**
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* Base URL for Mediawiki ontology.
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*/
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const ONTOLOGY_URL = 'https://www.mediawiki.org/ontology#';
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/**
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* OWL description of the ontology.
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*/
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const OWL_URL = 'https://www.mediawiki.org/ontology/ontology.owl';
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/**
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* Current version of the dump format.
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*/
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const FORMAT_VERSION = "1.0";
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/**
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* @var RdfWriter
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*/
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private $rdfWriter;
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public function __construct( RdfWriter $writer ) {
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$this->rdfWriter = $writer;
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}
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/**
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* Setup prefixes relevant for the dump
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*/
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public function setupPrefixes() {
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$this->rdfWriter->prefix( self::ONTOLOGY_PREFIX, self::ONTOLOGY_URL );
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$this->rdfWriter->prefix( 'rdfs', 'http://www.w3.org/2000/01/rdf-schema#' );
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$this->rdfWriter->prefix( 'owl', 'http://www.w3.org/2002/07/owl#' );
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$this->rdfWriter->prefix( 'schema', 'http://schema.org/' );
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$this->rdfWriter->prefix( 'cc', 'http://creativecommons.org/ns#' );
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}
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/**
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* Write RDF data for link between categories.
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* @param string $fromName Child category name
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* @param string $toName Parent category name
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*/
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public function writeCategoryLinkData( $fromName, $toName ) {
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$titleFrom = Title::makeTitle( NS_CATEGORY, $fromName );
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$titleTo = Title::makeTitle( NS_CATEGORY, $toName );
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$this->rdfWriter->about( $this->titleToUrl( $titleFrom ) )
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->say( self::ONTOLOGY_PREFIX, 'isInCategory' )
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->is( $this->titleToUrl( $titleTo ) );
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}
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/**
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* Write out the data for single category.
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* @param string $categoryName Category name
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*/
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public function writeCategoryData( $categoryName ) {
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$title = Title::makeTitle( NS_CATEGORY, $categoryName );
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$this->rdfWriter->about( $this->titleToUrl( $title ) )
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->say( 'a' )
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->is( self::ONTOLOGY_PREFIX, 'Category' );
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$titletext = $title->getText();
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$this->rdfWriter->say( 'rdfs', 'label' )->value( $titletext );
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}
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/**
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* Convert Title to link to target page.
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* @param Title $title
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* @return string
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*/
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private function titleToUrl( Title $title ) {
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return $title->getFullURL( '', false, PROTO_CANONICAL );
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}
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}
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