                        $dbfield = $this->GetFieldFromProp(str_replace("_IsEmpty", "", $prop));
                        $this->_where .= $this->_where_delim . " " . $dbfield . " = ''";
                        $this->_where_delim = " and";
                    } elseif (substr($prop, - 11) == "_IsNotEmpty" && $this->$prop ?? '') {
NVD is only using a subset of CWE for mapping instead of the entire CWE, and the weakness type is not covered by that subset.