protected function defineAttributes()
{
return array('path' => array(AttributeType::String), 'url' => array(AttributeType::String), 'extension' => array(AttributeType::String), 'mimeType' => array(AttributeType::String), 'width' => array(AttributeType::Number), 'height' => array(AttributeType::Number), 'size' => array(AttributeType::Number));
}