@deftypefun {const char *} {dane_cert_usage_name} (dane_cert_usage_t @var{usage})
@var{usage}: is a DANE certificate usage

Convert a @code{dane_cert_usage_t}  value to a string.

@strong{Returns:} a string that contains the name of the specified
type, or @code{NULL} .
@end deftypefun