/**
* Returns TRUE if $key is a standard descriptor
* defined by the string constants in this interface and FALSE if it is
* either a valid implementation-specific key or not a valid key.
*
* @param string $key a descriptor key.
* @return boolan whether $key is a standard descriptor.
* @api
*/
public function isStandardDescriptor($key)
{
$ref = new ReflectionClass('PHPCR_RepositoryInterface');
$consts = $ref->getConstantcs();
return in_array($key, $consts);
}
