Register new datatype

This example shows how to register a new dataType/dataValue in Semantic MediaWiki and the convention for the datatype key is to use ___ as leading identifer to distinguish them from those defined by Semantic MediaWiki itself.

SMW::DataType::initTypes

use Hooks;
use Foo\DataValues\FooValue;

Hooks::register( 'SMW::DataType::initTypes', function ( $dataTypeRegistry ) {

    $dataTypeRegistry->registerDatatype(
        FooValue::TYPE_ID,
        FooValue::class,
        DataItem::TYPE_BLOB
    );

    $dataTypeRegistry->setOption(
        'foovalue.SomeSetting',
        42
    );

    return true;
};

DataValue representation

class FooValue extends DataValue {

    const TYPE_ID = '___foo_bar';

    protected function parseUserValue( $userValue ) {
        ...
    }
}

Usage

$fooValue = DataValueFactory::getInstance()->newTypeIdValue(
    '___foo_bar',
    'Bar'
)

$fooValue->getShortWikiText();