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## 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
```php
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
```php
class FooValue extends DataValue {
/**
* DV identifier
*/
const TYPE_ID = '___foo_bar';
/**
* @see DataValue::parseUserValue
* @note called by DataValue::setUserValue
*
* @param string $value
*/
protected function parseUserValue( $userValue ) {
...
}
}
```
### Usage
```php
$fooValue = DataValueFactory::getInstance()->newTypeIdValue(
'___foo_bar',
'Bar'
)
$fooValue->getShortWikiText();
```
|
