Constructor for creating a new decimal literal
mixed $value The value of the literal:
string $lang Should be null (literals with a datatype can't have a language):
string $datatype Optional datatype (default 'xsd:decimal'):
object EasyRdf_Literal_Decimal
Overrides EasyRdf_Literal::__construct
public function __construct($value, $lang = null, $datatype = null) {
parent::__construct($value, null, $datatype);
}