named-rrchecker — syntax checker for individual DNS resource records
named-rrchecker read a individual DNS resource record from standard input and checks if it is syntactically correct.
-h prints out the help menu.
option specifies a origin to be used when interpreting the record.
-p prints out the resulting record in canonical
form. If there is no canonical form defined then the record will be
printed in unknown record format.
-u prints out the resulting record in unknown record
print out the known class, standard type and private type mnemonics