/// The Protocol and Algorithm fields must be within their valid
/// ranges. The Public Key field must be present and must contain a
/// Base64 encoding of the public key. Whitespace is allowed within the
-/// Base64 text. It is okay for the key data to be missing. BIND 9 seems
-/// to accept such cases. What we should do could be debatable, but
-/// since this field is algorithm dependent and our implementation
-/// doesn't reject unknown algorithms, we are lenient here.
+/// Base64 text.
+///
+/// It is okay for the key data to be missing. Note: BIND 9 also accepts
+/// DNSKEY missing key data. While the RFC is silent in this case, and it
+/// may be debatable what an implementation should do, but since this field
+/// is algorithm dependent and this implementations doesn't reject unknown
+/// algorithms, it's lenient here.
///
/// \throw InvalidRdataText if any fields are out of their valid range,
/// or are incorrect.
/// The passed buffer must contain a valid DNSKEY RDATA.
///
/// The Protocol and Algorithm fields are not checked for unknown
-/// values. It is okay for the key data to be missing. BIND 9 seems to
-/// accept such cases. What we should do could be debatable, but since
-/// this field is algorithm dependent and our implementation doesn't
-/// reject unknown algorithms, we are lenient here.
+/// values. It is okay for the key data to be missing (see the description
+/// of the constructor from string).
DNSKEY::DNSKEY(InputBuffer& buffer, size_t rdata_len) :
impl_(NULL)
{