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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
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14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
19 use Wikimedia\Purtle\RdfWriter
;
22 * Helper class to produce RDF representation of categories.
26 * Prefix used for Mediawiki ontology in the dump.
28 const ONTOLOGY_PREFIX
= 'mediawiki';
30 * Base URL for Mediawiki ontology.
32 const ONTOLOGY_URL
= 'https://www.mediawiki.org/ontology#';
34 * OWL description of the ontology.
36 const OWL_URL
= 'https://www.mediawiki.org/ontology/ontology.owl';
38 * Current version of the dump format.
40 const FORMAT_VERSION
= "1.0";
46 public function __construct( RdfWriter
$writer ) {
47 $this->rdfWriter
= $writer;
51 * Setup prefixes relevant for the dump
53 public function setupPrefixes() {
54 $this->rdfWriter
->prefix( self
::ONTOLOGY_PREFIX
, self
::ONTOLOGY_URL
);
55 $this->rdfWriter
->prefix( 'rdfs', 'http://www.w3.org/2000/01/rdf-schema#' );
56 $this->rdfWriter
->prefix( 'owl', 'http://www.w3.org/2002/07/owl#' );
57 $this->rdfWriter
->prefix( 'schema', 'http://schema.org/' );
58 $this->rdfWriter
->prefix( 'cc', 'http://creativecommons.org/ns#' );
62 * Write RDF data for link between categories.
63 * @param string $fromName Child category name
64 * @param string $toName Parent category name
66 public function writeCategoryLinkData( $fromName, $toName ) {
67 $titleFrom = Title
::makeTitle( NS_CATEGORY
, $fromName );
68 $titleTo = Title
::makeTitle( NS_CATEGORY
, $toName );
69 $this->rdfWriter
->about( $this->titleToUrl( $titleFrom ) )
70 ->say( self
::ONTOLOGY_PREFIX
, 'isInCategory' )
71 ->is( $this->titleToUrl( $titleTo ) );
75 * Write out the data for single category.
76 * @param string $categoryName Category name
78 public function writeCategoryData( $categoryName ) {
79 $title = Title
::makeTitle( NS_CATEGORY
, $categoryName );
80 $this->rdfWriter
->about( $this->titleToUrl( $title ) )
82 ->is( self
::ONTOLOGY_PREFIX
, 'Category' );
83 $titletext = $title->getText();
84 $this->rdfWriter
->say( 'rdfs', 'label' )->value( $titletext );
88 * Convert Title to link to target page.
92 private function titleToUrl( Title
$title ) {
93 return $title->getFullURL( '', false, PROTO_CANONICAL
);