/**
* Return true if the record is valid.
*
* A nested record is valid iff it and all contained records are valid.
*
* @see Record::isValid()
*
* @return boolean
*/
public function isValid()
{
return parent::isValid() && !Helper::every($this->_records, function (Record $record) {
return $record->isValid();
});
}
/**
* Return TRUE if the record is valid.
*
* A valid authority record MUST have exactly one valid PPN field
* (003@/00$0) and exactly one type field (002@/0$0) with a type indicator
* `T'.
*
* @see AuthorityRecord::checkPPN();
* @see AuthorityRecord::checkType();
*
* @return boolean TRUE if the record is valid
*/
public function isValid()
{
return parent::isValid() && $this->checkPPN() && $this->checkType();
}
